diff --git a/src/cmds/restic/cmd_backup.go b/src/cmds/restic/cmd_backup.go
index 38f6fcf7..dc07be01 100644
--- a/src/cmds/restic/cmd_backup.go
+++ b/src/cmds/restic/cmd_backup.go
@@ -13,7 +13,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"golang.org/x/crypto/ssh/terminal"
 )
@@ -232,7 +232,7 @@ func filterExisting(items []string) (result []string, err error) {
 	}
 
 	if len(result) == 0 {
-		return nil, restic.Fatal("all target directories/files do not exist")
+		return nil, errors.Fatal("all target directories/files do not exist")
 	}
 
 	return
@@ -240,7 +240,7 @@ func filterExisting(items []string) (result []string, err error) {
 
 func (cmd CmdBackup) readFromStdin(args []string) error {
 	if len(args) != 0 {
-		return restic.Fatalf("when reading from stdin, no additional files can be specified")
+		return errors.Fatalf("when reading from stdin, no additional files can be specified")
 	}
 
 	repo, err := cmd.global.OpenRepository()
@@ -274,7 +274,7 @@ func (cmd CmdBackup) Execute(args []string) error {
 	}
 
 	if len(args) == 0 {
-		return restic.Fatalf("wrong number of parameters, Usage: %s", cmd.Usage())
+		return errors.Fatalf("wrong number of parameters, Usage: %s", cmd.Usage())
 	}
 
 	target := make([]string, 0, len(args))
@@ -312,7 +312,7 @@ func (cmd CmdBackup) Execute(args []string) error {
 	if !cmd.Force && cmd.Parent != "" {
 		id, err := restic.FindSnapshot(repo, cmd.Parent)
 		if err != nil {
-			return restic.Fatalf("invalid id %q: %v", cmd.Parent, err)
+			return errors.Fatalf("invalid id %q: %v", cmd.Parent, err)
 		}
 
 		parentSnapshotID = &id
diff --git a/src/cmds/restic/cmd_cat.go b/src/cmds/restic/cmd_cat.go
index f99d93e7..51fb2f69 100644
--- a/src/cmds/restic/cmd_cat.go
+++ b/src/cmds/restic/cmd_cat.go
@@ -8,6 +8,7 @@ import (
 	"restic"
 	"restic/backend"
 	"restic/debug"
+	"restic/errors"
 	"restic/repository"
 )
 
@@ -31,7 +32,7 @@ func (cmd CmdCat) Usage() string {
 
 func (cmd CmdCat) Execute(args []string) error {
 	if len(args) < 1 || (args[0] != "masterkey" && args[0] != "config" && len(args) != 2) {
-		return restic.Fatalf("type or ID not specified, Usage: %s", cmd.Usage())
+		return errors.Fatalf("type or ID not specified, Usage: %s", cmd.Usage())
 	}
 
 	repo, err := cmd.global.OpenRepository()
@@ -52,7 +53,7 @@ func (cmd CmdCat) Execute(args []string) error {
 		id, err = restic.ParseID(args[1])
 		if err != nil {
 			if tpe != "snapshot" {
-				return restic.Fatalf("unable to parse ID: %v\n", err)
+				return errors.Fatalf("unable to parse ID: %v\n", err)
 			}
 
 			// find snapshot id with prefix
@@ -181,7 +182,7 @@ func (cmd CmdCat) Execute(args []string) error {
 			return err
 		}
 
-		return restic.Fatal("blob not found")
+		return errors.Fatal("blob not found")
 
 	case "tree":
 		debug.Log("cat", "cat tree %v", id.Str())
@@ -202,6 +203,6 @@ func (cmd CmdCat) Execute(args []string) error {
 		return nil
 
 	default:
-		return restic.Fatal("invalid type")
+		return errors.Fatal("invalid type")
 	}
 }
diff --git a/src/cmds/restic/cmd_check.go b/src/cmds/restic/cmd_check.go
index a151fc93..cd2fc409 100644
--- a/src/cmds/restic/cmd_check.go
+++ b/src/cmds/restic/cmd_check.go
@@ -9,6 +9,7 @@ import (
 
 	"restic"
 	"restic/checker"
+	"restic/errors"
 )
 
 type CmdCheck struct {
@@ -65,7 +66,7 @@ func (cmd CmdCheck) newReadProgress(todo restic.Stat) *restic.Progress {
 
 func (cmd CmdCheck) Execute(args []string) error {
 	if len(args) != 0 {
-		return restic.Fatal("check has no arguments")
+		return errors.Fatal("check has no arguments")
 	}
 
 	repo, err := cmd.global.OpenRepository()
@@ -103,7 +104,7 @@ func (cmd CmdCheck) Execute(args []string) error {
 		for _, err := range errs {
 			cmd.global.Warnf("error: %v\n", err)
 		}
-		return restic.Fatal("LoadIndex returned errors")
+		return errors.Fatal("LoadIndex returned errors")
 	}
 
 	done := make(chan struct{})
@@ -158,7 +159,7 @@ func (cmd CmdCheck) Execute(args []string) error {
 	}
 
 	if errorsFound {
-		return restic.Fatal("repository contains errors")
+		return errors.Fatal("repository contains errors")
 	}
 	return nil
 }
diff --git a/src/cmds/restic/cmd_dump.go b/src/cmds/restic/cmd_dump.go
index 5dc0247e..f29aff90 100644
--- a/src/cmds/restic/cmd_dump.go
+++ b/src/cmds/restic/cmd_dump.go
@@ -9,6 +9,7 @@ import (
 	"os"
 
 	"restic"
+	"restic/errors"
 	"restic/pack"
 	"restic/repository"
 
@@ -170,7 +171,7 @@ func (cmd CmdDump) DumpIndexes() error {
 
 func (cmd CmdDump) Execute(args []string) error {
 	if len(args) != 1 {
-		return restic.Fatalf("type not specified, Usage: %s", cmd.Usage())
+		return errors.Fatalf("type not specified, Usage: %s", cmd.Usage())
 	}
 
 	repo, err := cmd.global.OpenRepository()
@@ -214,6 +215,6 @@ func (cmd CmdDump) Execute(args []string) error {
 
 		return nil
 	default:
-		return restic.Fatalf("no such type %q", tpe)
+		return errors.Fatalf("no such type %q", tpe)
 	}
 }
diff --git a/src/cmds/restic/cmd_find.go b/src/cmds/restic/cmd_find.go
index 96d31dd6..24258d51 100644
--- a/src/cmds/restic/cmd_find.go
+++ b/src/cmds/restic/cmd_find.go
@@ -6,6 +6,7 @@ import (
 
 	"restic"
 	"restic/debug"
+	"restic/errors"
 	"restic/repository"
 )
 
@@ -55,7 +56,7 @@ func parseTime(str string) (time.Time, error) {
 		}
 	}
 
-	return time.Time{}, restic.Fatalf("unable to parse time: %q", str)
+	return time.Time{}, errors.Fatalf("unable to parse time: %q", str)
 }
 
 func (c CmdFind) findInTree(repo *repository.Repository, id restic.ID, path string) ([]findResult, error) {
@@ -135,7 +136,7 @@ func (CmdFind) Usage() string {
 
 func (c CmdFind) Execute(args []string) error {
 	if len(args) != 1 {
-		return restic.Fatalf("wrong number of arguments, Usage: %s", c.Usage())
+		return errors.Fatalf("wrong number of arguments, Usage: %s", c.Usage())
 	}
 
 	var err error
@@ -175,7 +176,7 @@ func (c CmdFind) Execute(args []string) error {
 	if c.Snapshot != "" {
 		snapshotID, err := restic.FindSnapshot(repo, c.Snapshot)
 		if err != nil {
-			return restic.Fatalf("invalid id %q: %v", args[1], err)
+			return errors.Fatalf("invalid id %q: %v", args[1], err)
 		}
 
 		return c.findInSnapshot(repo, snapshotID)
diff --git a/src/cmds/restic/cmd_init.go b/src/cmds/restic/cmd_init.go
index 3e68ebde..39b8cd2f 100644
--- a/src/cmds/restic/cmd_init.go
+++ b/src/cmds/restic/cmd_init.go
@@ -1,7 +1,7 @@
 package main
 
 import (
-	"restic"
+	"restic/errors"
 	"restic/repository"
 )
 
@@ -11,7 +11,7 @@ type CmdInit struct {
 
 func (cmd CmdInit) Execute(args []string) error {
 	if cmd.global.Repo == "" {
-		return restic.Fatal("Please specify repository location (-r)")
+		return errors.Fatal("Please specify repository location (-r)")
 	}
 
 	be, err := create(cmd.global.Repo)
diff --git a/src/cmds/restic/cmd_key.go b/src/cmds/restic/cmd_key.go
index 629f5ddf..84801815 100644
--- a/src/cmds/restic/cmd_key.go
+++ b/src/cmds/restic/cmd_key.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"restic"
 
+	"restic/errors"
 	"restic/repository"
 )
 
@@ -68,7 +69,7 @@ func (cmd CmdKey) getNewPassword() string {
 func (cmd CmdKey) addKey(repo *repository.Repository) error {
 	id, err := repository.AddKey(repo, cmd.getNewPassword(), repo.Key())
 	if err != nil {
-		return restic.Fatalf("creating new key failed: %v\n", err)
+		return errors.Fatalf("creating new key failed: %v\n", err)
 	}
 
 	cmd.global.Verbosef("saved new key as %s\n", id)
@@ -78,7 +79,7 @@ func (cmd CmdKey) addKey(repo *repository.Repository) error {
 
 func (cmd CmdKey) deleteKey(repo *repository.Repository, name string) error {
 	if name == repo.KeyName() {
-		return restic.Fatal("refusing to remove key currently used to access repository")
+		return errors.Fatal("refusing to remove key currently used to access repository")
 	}
 
 	err := repo.Backend().Remove(restic.KeyFile, name)
@@ -93,7 +94,7 @@ func (cmd CmdKey) deleteKey(repo *repository.Repository, name string) error {
 func (cmd CmdKey) changePassword(repo *repository.Repository) error {
 	id, err := repository.AddKey(repo, cmd.getNewPassword(), repo.Key())
 	if err != nil {
-		return restic.Fatalf("creating new key failed: %v\n", err)
+		return errors.Fatalf("creating new key failed: %v\n", err)
 	}
 
 	err = repo.Backend().Remove(restic.KeyFile, repo.KeyName())
@@ -112,7 +113,7 @@ func (cmd CmdKey) Usage() string {
 
 func (cmd CmdKey) Execute(args []string) error {
 	if len(args) < 1 || (args[0] == "rm" && len(args) != 2) {
-		return restic.Fatalf("wrong number of arguments, Usage: %s", cmd.Usage())
+		return errors.Fatalf("wrong number of arguments, Usage: %s", cmd.Usage())
 	}
 
 	repo, err := cmd.global.OpenRepository()
diff --git a/src/cmds/restic/cmd_list.go b/src/cmds/restic/cmd_list.go
index b208e3ee..a17d5ce6 100644
--- a/src/cmds/restic/cmd_list.go
+++ b/src/cmds/restic/cmd_list.go
@@ -1,6 +1,9 @@
 package main
 
-import "restic"
+import (
+	"restic"
+	"restic/errors"
+)
 
 type CmdList struct {
 	global *GlobalOptions
@@ -22,7 +25,7 @@ func (cmd CmdList) Usage() string {
 
 func (cmd CmdList) Execute(args []string) error {
 	if len(args) != 1 {
-		return restic.Fatalf("type not specified, Usage: %s", cmd.Usage())
+		return errors.Fatalf("type not specified, Usage: %s", cmd.Usage())
 	}
 
 	repo, err := cmd.global.OpenRepository()
@@ -51,7 +54,7 @@ func (cmd CmdList) Execute(args []string) error {
 	case "locks":
 		t = restic.LockFile
 	default:
-		return restic.Fatal("invalid type")
+		return errors.Fatal("invalid type")
 	}
 
 	for id := range repo.List(t, nil) {
diff --git a/src/cmds/restic/cmd_ls.go b/src/cmds/restic/cmd_ls.go
index d875e58e..733f424b 100644
--- a/src/cmds/restic/cmd_ls.go
+++ b/src/cmds/restic/cmd_ls.go
@@ -6,6 +6,7 @@ import (
 	"path/filepath"
 
 	"restic"
+	"restic/errors"
 	"restic/repository"
 )
 
@@ -71,7 +72,7 @@ func (cmd CmdLs) Usage() string {
 
 func (cmd CmdLs) Execute(args []string) error {
 	if len(args) < 1 || len(args) > 2 {
-		return restic.Fatalf("wrong number of arguments, Usage: %s", cmd.Usage())
+		return errors.Fatalf("wrong number of arguments, Usage: %s", cmd.Usage())
 	}
 
 	repo, err := cmd.global.OpenRepository()
diff --git a/src/cmds/restic/cmd_mount.go b/src/cmds/restic/cmd_mount.go
index 36a2ce99..e25306e3 100644
--- a/src/cmds/restic/cmd_mount.go
+++ b/src/cmds/restic/cmd_mount.go
@@ -5,9 +5,8 @@ package main
 
 import (
 	"os"
-	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	resticfs "restic/fs"
 	"restic/fuse"
@@ -44,7 +43,7 @@ func (cmd CmdMount) Usage() string {
 
 func (cmd CmdMount) Execute(args []string) error {
 	if len(args) == 0 {
-		return restic.Fatalf("wrong number of parameters, Usage: %s", cmd.Usage())
+		return errors.Fatalf("wrong number of parameters, Usage: %s", cmd.Usage())
 	}
 
 	repo, err := cmd.global.OpenRepository()
diff --git a/src/cmds/restic/cmd_prune.go b/src/cmds/restic/cmd_prune.go
index c21cab16..4fa8ba0d 100644
--- a/src/cmds/restic/cmd_prune.go
+++ b/src/cmds/restic/cmd_prune.go
@@ -5,6 +5,7 @@ import (
 	"os"
 	"restic"
 	"restic/debug"
+	"restic/errors"
 	"restic/index"
 	"restic/repository"
 	"time"
@@ -189,7 +190,7 @@ nextPack:
 		removePacks.Insert(packID)
 
 		if !rewritePacks.Has(packID) {
-			return restic.Fatalf("pack %v is unneeded, but not contained in rewritePacks", packID.Str())
+			return errors.Fatalf("pack %v is unneeded, but not contained in rewritePacks", packID.Str())
 		}
 
 		rewritePacks.Delete(packID)
diff --git a/src/cmds/restic/cmd_restore.go b/src/cmds/restic/cmd_restore.go
index 1a55cdb4..88099b67 100644
--- a/src/cmds/restic/cmd_restore.go
+++ b/src/cmds/restic/cmd_restore.go
@@ -3,6 +3,7 @@ package main
 import (
 	"restic"
 	"restic/debug"
+	"restic/errors"
 	"restic/filter"
 )
 
@@ -32,15 +33,15 @@ func (cmd CmdRestore) Usage() string {
 
 func (cmd CmdRestore) Execute(args []string) error {
 	if len(args) != 1 {
-		return restic.Fatalf("wrong number of arguments, Usage: %s", cmd.Usage())
+		return errors.Fatalf("wrong number of arguments, Usage: %s", cmd.Usage())
 	}
 
 	if cmd.Target == "" {
-		return restic.Fatal("please specify a directory to restore to (--target)")
+		return errors.Fatal("please specify a directory to restore to (--target)")
 	}
 
 	if len(cmd.Exclude) > 0 && len(cmd.Include) > 0 {
-		return restic.Fatal("exclude and include patterns are mutually exclusive")
+		return errors.Fatal("exclude and include patterns are mutually exclusive")
 	}
 
 	snapshotIDString := args[0]
diff --git a/src/cmds/restic/cmd_snapshots.go b/src/cmds/restic/cmd_snapshots.go
index 23f9eb70..d7bc4e65 100644
--- a/src/cmds/restic/cmd_snapshots.go
+++ b/src/cmds/restic/cmd_snapshots.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"restic/errors"
 	"sort"
 	"strings"
 
@@ -69,7 +70,7 @@ func (cmd CmdSnapshots) Usage() string {
 
 func (cmd CmdSnapshots) Execute(args []string) error {
 	if len(args) != 0 {
-		return restic.Fatalf("wrong number of arguments, usage: %s", cmd.Usage())
+		return errors.Fatalf("wrong number of arguments, usage: %s", cmd.Usage())
 	}
 
 	repo, err := cmd.global.OpenRepository()
diff --git a/src/cmds/restic/global.go b/src/cmds/restic/global.go
index b7eff3e4..ee4255f7 100644
--- a/src/cmds/restic/global.go
+++ b/src/cmds/restic/global.go
@@ -17,8 +17,9 @@ import (
 	"restic/location"
 	"restic/repository"
 
+	"restic/errors"
+
 	"github.com/jessevdk/go-flags"
-	"github.com/pkg/errors"
 	"golang.org/x/crypto/ssh/terminal"
 )
 
@@ -246,7 +247,7 @@ const maxKeys = 20
 // OpenRepository reads the password and opens the repository.
 func (o GlobalOptions) OpenRepository() (*repository.Repository, error) {
 	if o.Repo == "" {
-		return nil, restic.Fatal("Please specify repository location (-r)")
+		return nil, errors.Fatal("Please specify repository location (-r)")
 	}
 
 	be, err := open(o.Repo)
@@ -262,7 +263,7 @@ func (o GlobalOptions) OpenRepository() (*repository.Repository, error) {
 
 	err = s.SearchKey(o.password, maxKeys)
 	if err != nil {
-		return nil, restic.Fatalf("unable to open repo: %v", err)
+		return nil, errors.Fatalf("unable to open repo: %v", err)
 	}
 
 	return s, nil
@@ -300,7 +301,7 @@ func open(s string) (restic.Backend, error) {
 	}
 
 	debug.Log("open", "invalid repository location: %v", s)
-	return nil, restic.Fatalf("invalid scheme %q", loc.Scheme)
+	return nil, errors.Fatalf("invalid scheme %q", loc.Scheme)
 }
 
 // Create the backend specified by URI.
@@ -335,5 +336,5 @@ func create(s string) (restic.Backend, error) {
 	}
 
 	debug.Log("open", "invalid repository scheme: %v", s)
-	return nil, restic.Fatalf("invalid scheme %q", loc.Scheme)
+	return nil, errors.Fatalf("invalid scheme %q", loc.Scheme)
 }
diff --git a/src/cmds/restic/integration_fuse_test.go b/src/cmds/restic/integration_fuse_test.go
index 857f6736..a106d035 100644
--- a/src/cmds/restic/integration_fuse_test.go
+++ b/src/cmds/restic/integration_fuse_test.go
@@ -10,7 +10,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic"
 	"restic/repository"
@@ -50,7 +50,7 @@ func waitForMount(dir string) error {
 		time.Sleep(mountSleep)
 	}
 
-	return restic.Fatalf("subdir %q of dir %s never appeared", mountTestSubdir, dir)
+	return errors.Fatalf("subdir %q of dir %s never appeared", mountTestSubdir, dir)
 }
 
 func cmdMount(t testing.TB, global GlobalOptions, dir string, ready, done chan struct{}) {
diff --git a/src/cmds/restic/integration_test.go b/src/cmds/restic/integration_test.go
index 3a3c53e6..4a737a6a 100644
--- a/src/cmds/restic/integration_test.go
+++ b/src/cmds/restic/integration_test.go
@@ -16,7 +16,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 	"restic/filter"
@@ -582,7 +582,7 @@ func testFileSize(filename string, size int64) error {
 	}
 
 	if fi.Size() != size {
-		return restic.Fatalf("wrong file size for %v: expected %v, got %v", filename, size, fi.Size())
+		return errors.Fatalf("wrong file size for %v: expected %v, got %v", filename, size, fi.Size())
 	}
 
 	return nil
diff --git a/src/cmds/restic/main.go b/src/cmds/restic/main.go
index 5ad0ab12..6477c1e6 100644
--- a/src/cmds/restic/main.go
+++ b/src/cmds/restic/main.go
@@ -7,8 +7,9 @@ import (
 	"restic/debug"
 	"runtime"
 
+	"restic/errors"
+
 	"github.com/jessevdk/go-flags"
-	"github.com/pkg/errors"
 )
 
 func init() {
@@ -42,7 +43,7 @@ func main() {
 	switch {
 	case restic.IsAlreadyLocked(errors.Cause(err)):
 		fmt.Fprintf(os.Stderr, "%v\nthe `unlock` command can be used to remove stale locks\n", err)
-	case restic.IsFatal(errors.Cause(err)):
+	case errors.IsFatal(errors.Cause(err)):
 		fmt.Fprintf(os.Stderr, "%v\n", err)
 	case err != nil:
 		fmt.Fprintf(os.Stderr, "%+v\n", err)
diff --git a/src/restic/archiver/archive_reader.go b/src/restic/archiver/archive_reader.go
index 0ddefd15..2a184ee4 100644
--- a/src/restic/archiver/archive_reader.go
+++ b/src/restic/archiver/archive_reader.go
@@ -7,8 +7,8 @@ import (
 	"restic/debug"
 	"time"
 
-	"github.com/pkg/errors"
 	"github.com/restic/chunker"
+	"restic/errors"
 )
 
 // saveTreeJSON stores a tree in the repository.
diff --git a/src/restic/archiver/archiver.go b/src/restic/archiver/archiver.go
index 9cbb34a0..99c91a39 100644
--- a/src/restic/archiver/archiver.go
+++ b/src/restic/archiver/archiver.go
@@ -11,7 +11,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 	"restic/fs"
diff --git a/src/restic/archiver/archiver_duplication_test.go b/src/restic/archiver/archiver_duplication_test.go
index 9f0867d5..aadfc590 100644
--- a/src/restic/archiver/archiver_duplication_test.go
+++ b/src/restic/archiver/archiver_duplication_test.go
@@ -8,7 +8,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic"
 	"restic/archiver"
diff --git a/src/restic/archiver/archiver_test.go b/src/restic/archiver/archiver_test.go
index 176a0180..1d43254c 100644
--- a/src/restic/archiver/archiver_test.go
+++ b/src/restic/archiver/archiver_test.go
@@ -12,8 +12,8 @@ import (
 	"restic/crypto"
 	. "restic/test"
 
-	"github.com/pkg/errors"
 	"github.com/restic/chunker"
+	"restic/errors"
 )
 
 var testPol = chunker.Pol(0x3DA3358B4DC173)
diff --git a/src/restic/backend/local/config.go b/src/restic/backend/local/config.go
index a430f9de..8a5c67a2 100644
--- a/src/restic/backend/local/config.go
+++ b/src/restic/backend/local/config.go
@@ -3,7 +3,7 @@ package local
 import (
 	"strings"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // ParseConfig parses a local backend config.
diff --git a/src/restic/backend/local/local.go b/src/restic/backend/local/local.go
index 4cfd4de9..1b76e31e 100644
--- a/src/restic/backend/local/local.go
+++ b/src/restic/backend/local/local.go
@@ -7,7 +7,7 @@ import (
 	"path/filepath"
 	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend"
 	"restic/debug"
diff --git a/src/restic/backend/mem/mem_backend.go b/src/restic/backend/mem/mem_backend.go
index 4d1ac49a..d8885de4 100644
--- a/src/restic/backend/mem/mem_backend.go
+++ b/src/restic/backend/mem/mem_backend.go
@@ -5,7 +5,7 @@ import (
 	"restic"
 	"sync"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 )
diff --git a/src/restic/backend/mem/mem_backend_test.go b/src/restic/backend/mem/mem_backend_test.go
index 310f4b91..75b65f4c 100644
--- a/src/restic/backend/mem/mem_backend_test.go
+++ b/src/restic/backend/mem/mem_backend_test.go
@@ -3,7 +3,7 @@ package mem_test
 import (
 	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend/mem"
 	"restic/backend/test"
diff --git a/src/restic/backend/rest/config.go b/src/restic/backend/rest/config.go
index e5903107..929fda12 100644
--- a/src/restic/backend/rest/config.go
+++ b/src/restic/backend/rest/config.go
@@ -4,7 +4,7 @@ import (
 	"net/url"
 	"strings"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Config contains all configuration necessary to connect to a REST server.
diff --git a/src/restic/backend/rest/rest.go b/src/restic/backend/rest/rest.go
index 040faac9..ce1d25db 100644
--- a/src/restic/backend/rest/rest.go
+++ b/src/restic/backend/rest/rest.go
@@ -11,7 +11,7 @@ import (
 	"restic"
 	"strings"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend"
 )
diff --git a/src/restic/backend/rest/rest_test.go b/src/restic/backend/rest/rest_test.go
index 81c64f48..2e7095b2 100644
--- a/src/restic/backend/rest/rest_test.go
+++ b/src/restic/backend/rest/rest_test.go
@@ -6,7 +6,7 @@ import (
 	"os"
 	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend/rest"
 	"restic/backend/test"
diff --git a/src/restic/backend/s3/config.go b/src/restic/backend/s3/config.go
index 4eda2b0e..2df02b58 100644
--- a/src/restic/backend/s3/config.go
+++ b/src/restic/backend/s3/config.go
@@ -5,7 +5,7 @@ import (
 	"path"
 	"strings"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Config contains all configuration necessary to connect to an s3 compatible
diff --git a/src/restic/backend/s3/s3.go b/src/restic/backend/s3/s3.go
index 3af65645..b9f29b6b 100644
--- a/src/restic/backend/s3/s3.go
+++ b/src/restic/backend/s3/s3.go
@@ -6,7 +6,7 @@ import (
 	"restic"
 	"strings"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"github.com/minio/minio-go"
 
diff --git a/src/restic/backend/s3/s3_test.go b/src/restic/backend/s3/s3_test.go
index ab4cc855..355352fa 100644
--- a/src/restic/backend/s3/s3_test.go
+++ b/src/restic/backend/s3/s3_test.go
@@ -6,7 +6,7 @@ import (
 	"os"
 	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend/s3"
 	"restic/backend/test"
diff --git a/src/restic/backend/sftp/config.go b/src/restic/backend/sftp/config.go
index d8e20049..abd8b0c2 100644
--- a/src/restic/backend/sftp/config.go
+++ b/src/restic/backend/sftp/config.go
@@ -5,7 +5,7 @@ import (
 	"path"
 	"strings"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Config collects all information required to connect to an sftp server.
diff --git a/src/restic/backend/sftp/sftp.go b/src/restic/backend/sftp/sftp.go
index a4681142..b323eb1b 100644
--- a/src/restic/backend/sftp/sftp.go
+++ b/src/restic/backend/sftp/sftp.go
@@ -13,7 +13,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend"
 	"restic/debug"
diff --git a/src/restic/backend/sftp/sftp_backend_test.go b/src/restic/backend/sftp/sftp_backend_test.go
index b7bcc259..567b2cf9 100644
--- a/src/restic/backend/sftp/sftp_backend_test.go
+++ b/src/restic/backend/sftp/sftp_backend_test.go
@@ -7,7 +7,7 @@ import (
 	"restic"
 	"strings"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend/sftp"
 	"restic/backend/test"
diff --git a/src/restic/backend/test/tests.go b/src/restic/backend/test/tests.go
index 8134eafb..4171b0bd 100644
--- a/src/restic/backend/test/tests.go
+++ b/src/restic/backend/test/tests.go
@@ -11,7 +11,7 @@ import (
 	"sort"
 	"testing"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend"
 	. "restic/test"
diff --git a/src/restic/backend/test/tests_test.go b/src/restic/backend/test/tests_test.go
index 92c08644..04e9936e 100644
--- a/src/restic/backend/test/tests_test.go
+++ b/src/restic/backend/test/tests_test.go
@@ -3,7 +3,7 @@ package test_test
 import (
 	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend/mem"
 	"restic/backend/test"
diff --git a/src/restic/backend/utils.go b/src/restic/backend/utils.go
index f060b6fc..82a89951 100644
--- a/src/restic/backend/utils.go
+++ b/src/restic/backend/utils.go
@@ -4,7 +4,7 @@ import (
 	"io"
 	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // LoadAll reads all data stored in the backend for the handle. The buffer buf
diff --git a/src/restic/backend_find.go b/src/restic/backend_find.go
index d788e679..193fd165 100644
--- a/src/restic/backend_find.go
+++ b/src/restic/backend_find.go
@@ -1,6 +1,6 @@
 package restic
 
-import "github.com/pkg/errors"
+import "restic/errors"
 
 // ErrNoIDPrefixFound is returned by Find() when no ID for the given prefix
 // could be found.
diff --git a/src/restic/blob.go b/src/restic/blob.go
index 56e478ad..6074b59b 100644
--- a/src/restic/blob.go
+++ b/src/restic/blob.go
@@ -3,7 +3,7 @@ package restic
 import (
 	"fmt"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Blob is one part of a file or a tree.
diff --git a/src/restic/checker/checker.go b/src/restic/checker/checker.go
index 9d673a94..88a8eec8 100644
--- a/src/restic/checker/checker.go
+++ b/src/restic/checker/checker.go
@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"sync"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic"
 	"restic/backend"
diff --git a/src/restic/config.go b/src/restic/config.go
index 5d169929..0afb5426 100644
--- a/src/restic/config.go
+++ b/src/restic/config.go
@@ -3,7 +3,7 @@ package restic
 import (
 	"testing"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 
diff --git a/src/restic/crypto/crypto.go b/src/restic/crypto/crypto.go
index 33b9dfda..2ebf5d31 100644
--- a/src/restic/crypto/crypto.go
+++ b/src/restic/crypto/crypto.go
@@ -7,7 +7,7 @@ import (
 	"encoding/json"
 	"fmt"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"golang.org/x/crypto/poly1305"
 )
diff --git a/src/restic/crypto/kdf.go b/src/restic/crypto/kdf.go
index ea8be37b..ccde35ac 100644
--- a/src/restic/crypto/kdf.go
+++ b/src/restic/crypto/kdf.go
@@ -5,8 +5,8 @@ import (
 	"time"
 
 	sscrypt "github.com/elithrar/simple-scrypt"
-	"github.com/pkg/errors"
 	"golang.org/x/crypto/scrypt"
+	"restic/errors"
 )
 
 const saltLength = 64
diff --git a/src/restic/debug/debug.go b/src/restic/debug/debug.go
index aeae376c..b1ab2b38 100644
--- a/src/restic/debug/debug.go
+++ b/src/restic/debug/debug.go
@@ -15,7 +15,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 type process struct {
diff --git a/src/restic/errors/doc.go b/src/restic/errors/doc.go
new file mode 100644
index 00000000..9f63cf95
--- /dev/null
+++ b/src/restic/errors/doc.go
@@ -0,0 +1,2 @@
+// Package errors provides custom error types used within restic.
+package errors
diff --git a/src/restic/errors.go b/src/restic/errors/fatal.go
similarity index 98%
rename from src/restic/errors.go
rename to src/restic/errors/fatal.go
index 1aa7e1fd..dce3a92b 100644
--- a/src/restic/errors.go
+++ b/src/restic/errors/fatal.go
@@ -1,4 +1,4 @@
-package restic
+package errors
 
 import "fmt"
 
diff --git a/src/restic/errors/wrap.go b/src/restic/errors/wrap.go
new file mode 100644
index 00000000..65b48de8
--- /dev/null
+++ b/src/restic/errors/wrap.go
@@ -0,0 +1,23 @@
+package errors
+
+import "github.com/pkg/errors"
+
+// Cause returns the cause of an error.
+func Cause(err error) error {
+	return errors.Cause(err)
+}
+
+// New creates a new error based on message.
+func New(message string) error {
+	return errors.New(message)
+}
+
+// Errorf creates an error based on a format string and values.
+func Errorf(format string, args ...interface{}) error {
+	return errors.Errorf(format, args...)
+}
+
+// Wrap wraps an error retrieved from outside of restic.
+func Wrap(err error, message string) error {
+	return errors.Wrap(err, message)
+}
diff --git a/src/restic/file.go b/src/restic/file.go
index 166546f5..bfe44ad4 100644
--- a/src/restic/file.go
+++ b/src/restic/file.go
@@ -3,7 +3,7 @@ package restic
 import (
 	"fmt"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // FileType is the type of a file in the backend.
diff --git a/src/restic/filter/filter.go b/src/restic/filter/filter.go
index 48ce01fb..bb483d31 100644
--- a/src/restic/filter/filter.go
+++ b/src/restic/filter/filter.go
@@ -4,7 +4,7 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // ErrBadString is returned when Match is called with the empty string as the
diff --git a/src/restic/fs/file_linux.go b/src/restic/fs/file_linux.go
index e3cdf960..f02c6470 100644
--- a/src/restic/fs/file_linux.go
+++ b/src/restic/fs/file_linux.go
@@ -6,7 +6,7 @@ import (
 	"os"
 	"syscall"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"golang.org/x/sys/unix"
 )
diff --git a/src/restic/fuse/file.go b/src/restic/fuse/file.go
index 83a17347..d5949ee8 100644
--- a/src/restic/fuse/file.go
+++ b/src/restic/fuse/file.go
@@ -6,7 +6,7 @@ package fuse
 import (
 	"sync"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic"
 	"restic/debug"
diff --git a/src/restic/fuse/file_test.go b/src/restic/fuse/file_test.go
index bd7bfdca..58e6b33b 100644
--- a/src/restic/fuse/file_test.go
+++ b/src/restic/fuse/file_test.go
@@ -9,7 +9,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"bazil.org/fuse"
 
diff --git a/src/restic/id.go b/src/restic/id.go
index 5a1f4ab6..6d1f55de 100644
--- a/src/restic/id.go
+++ b/src/restic/id.go
@@ -8,7 +8,7 @@ import (
 	"encoding/json"
 	"io"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Hash returns the ID for data.
diff --git a/src/restic/index/index.go b/src/restic/index/index.go
index e2f7f831..9027e3fd 100644
--- a/src/restic/index/index.go
+++ b/src/restic/index/index.go
@@ -9,7 +9,7 @@ import (
 	"restic/list"
 	"restic/worker"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Pack contains information about the contents of a pack.
diff --git a/src/restic/lock.go b/src/restic/lock.go
index 2cb0a113..f32df4f7 100644
--- a/src/restic/lock.go
+++ b/src/restic/lock.go
@@ -10,7 +10,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 )
diff --git a/src/restic/lock_unix.go b/src/restic/lock_unix.go
index 6b481ed2..d1b7fb0a 100644
--- a/src/restic/lock_unix.go
+++ b/src/restic/lock_unix.go
@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"syscall"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 )
diff --git a/src/restic/mock/backend.go b/src/restic/mock/backend.go
index 717f38bf..5aadc849 100644
--- a/src/restic/mock/backend.go
+++ b/src/restic/mock/backend.go
@@ -3,7 +3,7 @@ package mock
 import (
 	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Backend implements a mock backend.
diff --git a/src/restic/node.go b/src/restic/node.go
index 842517d4..427ed630 100644
--- a/src/restic/node.go
+++ b/src/restic/node.go
@@ -10,7 +10,7 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"runtime"
 
diff --git a/src/restic/node_linux.go b/src/restic/node_linux.go
index 57a5e5c4..7ebad89f 100644
--- a/src/restic/node_linux.go
+++ b/src/restic/node_linux.go
@@ -6,7 +6,7 @@ import (
 
 	"golang.org/x/sys/unix"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/fs"
 )
diff --git a/src/restic/node_windows.go b/src/restic/node_windows.go
index 08a7f86a..050de8f2 100644
--- a/src/restic/node_windows.go
+++ b/src/restic/node_windows.go
@@ -3,7 +3,7 @@ package restic
 import (
 	"syscall"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // mknod() creates a filesystem node (file, device
diff --git a/src/restic/pack/pack.go b/src/restic/pack/pack.go
index a1e62d54..40d10839 100644
--- a/src/restic/pack/pack.go
+++ b/src/restic/pack/pack.go
@@ -8,7 +8,7 @@ import (
 	"restic"
 	"sync"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/crypto"
 )
diff --git a/src/restic/pipe/pipe.go b/src/restic/pipe/pipe.go
index 48a83a36..1ed9b616 100644
--- a/src/restic/pipe/pipe.go
+++ b/src/restic/pipe/pipe.go
@@ -6,7 +6,7 @@ import (
 	"path/filepath"
 	"sort"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 	"restic/fs"
diff --git a/src/restic/rand_reader.go b/src/restic/rand_reader.go
index cfe50222..205fd6ab 100644
--- a/src/restic/rand_reader.go
+++ b/src/restic/rand_reader.go
@@ -4,7 +4,7 @@ import (
 	"io"
 	"math/rand"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // RandReader allows reading from a rand.Rand.
diff --git a/src/restic/repository/index.go b/src/restic/repository/index.go
index f543a25e..02937406 100644
--- a/src/restic/repository/index.go
+++ b/src/restic/repository/index.go
@@ -8,7 +8,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/crypto"
 	"restic/debug"
diff --git a/src/restic/repository/key.go b/src/restic/repository/key.go
index 7b03ae10..b874dc64 100644
--- a/src/restic/repository/key.go
+++ b/src/restic/repository/key.go
@@ -8,7 +8,7 @@ import (
 	"restic"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend"
 	"restic/crypto"
diff --git a/src/restic/repository/master_index.go b/src/restic/repository/master_index.go
index f82121fb..a3489e53 100644
--- a/src/restic/repository/master_index.go
+++ b/src/restic/repository/master_index.go
@@ -4,7 +4,7 @@ import (
 	"restic"
 	"sync"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 )
diff --git a/src/restic/repository/packer_manager.go b/src/restic/repository/packer_manager.go
index ea08a114..85c5b186 100644
--- a/src/restic/repository/packer_manager.go
+++ b/src/restic/repository/packer_manager.go
@@ -7,7 +7,7 @@ import (
 	"restic"
 	"sync"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/crypto"
 	"restic/debug"
diff --git a/src/restic/repository/parallel_test.go b/src/restic/repository/parallel_test.go
index 30b0238b..cfa384a0 100644
--- a/src/restic/repository/parallel_test.go
+++ b/src/restic/repository/parallel_test.go
@@ -6,7 +6,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/repository"
 	. "restic/test"
diff --git a/src/restic/repository/repack.go b/src/restic/repository/repack.go
index 95e0eae0..274f2d32 100644
--- a/src/restic/repository/repack.go
+++ b/src/restic/repository/repack.go
@@ -8,7 +8,7 @@ import (
 	"restic/debug"
 	"restic/pack"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Repack takes a list of packs together with a list of blobs contained in
diff --git a/src/restic/repository/repository.go b/src/restic/repository/repository.go
index bc36e050..a400b85e 100644
--- a/src/restic/repository/repository.go
+++ b/src/restic/repository/repository.go
@@ -8,7 +8,7 @@ import (
 	"os"
 	"restic"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/backend"
 	"restic/crypto"
diff --git a/src/restic/restorer.go b/src/restic/restorer.go
index 9784df8e..7ea7f012 100644
--- a/src/restic/restorer.go
+++ b/src/restic/restorer.go
@@ -4,7 +4,7 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 	"restic/fs"
diff --git a/src/restic/snapshot.go b/src/restic/snapshot.go
index 4775cbd7..dc351e8e 100644
--- a/src/restic/snapshot.go
+++ b/src/restic/snapshot.go
@@ -7,7 +7,7 @@ import (
 	"path/filepath"
 	"time"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 )
 
 // Snapshot is the state of a resource at one point in time.
diff --git a/src/restic/testing.go b/src/restic/testing.go
index 1be705bb..e4fe6ddb 100644
--- a/src/restic/testing.go
+++ b/src/restic/testing.go
@@ -8,8 +8,8 @@ import (
 	"testing"
 	"time"
 
-	"github.com/pkg/errors"
 	"github.com/restic/chunker"
+	"restic/errors"
 )
 
 // fakeFile returns a reader which yields deterministic pseudo-random data.
diff --git a/src/restic/tree.go b/src/restic/tree.go
index 94e51b32..f27393fa 100644
--- a/src/restic/tree.go
+++ b/src/restic/tree.go
@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"sort"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/debug"
 )
diff --git a/src/restic/worker/pool_test.go b/src/restic/worker/pool_test.go
index 329ce9a8..9d6159b8 100644
--- a/src/restic/worker/pool_test.go
+++ b/src/restic/worker/pool_test.go
@@ -3,7 +3,7 @@ package worker_test
 import (
 	"testing"
 
-	"github.com/pkg/errors"
+	"restic/errors"
 
 	"restic/worker"
 )