diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd832c6e3..33e716cbc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,7 +62,7 @@ else()
     add_compile_options(-Wall -Werror)
 endif()
 
-execute_process( 
+execute_process(
 	COMMAND uname -m
 	COMMAND tr -d '\n'
 	OUTPUT_VARIABLE ARCH
@@ -104,7 +104,7 @@ pkg_check_modules(LIBCONFIG IMPORTED_TARGET libconfig>=1.4.9)
 pkg_check_modules(RABBITMQ_C IMPORTED_TARGET librabbitmq>=0.8.0)
 pkg_check_modules(COMEDILIB IMPORTED_TARGET comedilib>=0.11.0)
 pkg_check_modules(LIBZMQ IMPORTED_TARGET libzmq>=2.2.0)
-pkg_check_modules(LIBWEBSOCKETS IMPORTED_TARGET libwebsockets>=2.3.0)
+pkg_check_modules(LIBWEBSOCKETS IMPORTED_TARGET REQUIRED libwebsockets>=2.3.0)
 pkg_check_modules(NANOMSG IMPORTED_TARGET nanomsg)
 if(NOT NANOMSG_FOUND)
     pkg_check_modules(NANOMSG IMPORTED_TARGET libnanomsg>=1.0.0)
@@ -169,7 +169,7 @@ else()
         OUTPUT_VARIABLE GIT_REV
         OUTPUT_STRIP_TRAILING_WHITESPACE
     )
-    
+
     execute_process(
         COMMAND git rev-parse --abbrev-ref HEAD
         WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
diff --git a/include/villas/config_helper.h b/include/villas/config_helper.h
index 96bdf704f..af1be6658 100644
--- a/include/villas/config_helper.h
+++ b/include/villas/config_helper.h
@@ -23,7 +23,10 @@
 #pragma once
 
 #include <jansson.h>
+
+#ifdef LIBCONFIG_FOUND
 #include <libconfig.h>
+#endif /* LIBCONFIG_FOUND */
 
 #include <villas/sample.h>
 
@@ -31,11 +34,13 @@
 extern "C" {
 #endif
 
+#ifdef LIBCONFIG_FOUND
 /* Convert a libconfig object to a jansson object */
 json_t *config_to_json(config_setting_t *cfg);
 
 /* Convert a jansson object into a libconfig object. */
 int json_to_config(json_t *json, config_setting_t *parent);
+#endif /* LIBCONFIG_FOUND */
 
 /* Create a JSON object from command line parameters. */
 json_t *json_load_cli(int argc, char *argv[]);
diff --git a/lib/hook.c b/lib/hook.c
index 65ca2340b..54b381a50 100644
--- a/lib/hook.c
+++ b/lib/hook.c
@@ -30,7 +30,6 @@
 #include <villas/utils.h>
 #include <villas/node.h>
 #include <villas/plugin.h>
-#include <villas/config_helper.h>
 
 int hook_init(struct hook *h, struct hook_type *vt, struct path *p, struct node *n)
 {
diff --git a/lib/node.c b/lib/node.c
index 280841523..fbbc8f653 100644
--- a/lib/node.c
+++ b/lib/node.c
@@ -28,7 +28,6 @@
 #include <villas/node.h>
 #include <villas/utils.h>
 #include <villas/plugin.h>
-#include <villas/config_helper.h>
 #include <villas/mapping.h>
 #include <villas/timing.h>
 #include <villas/signal.h>
diff --git a/lib/nodes/CMakeLists.txt b/lib/nodes/CMakeLists.txt
index 123523853..b735a6e8e 100644
--- a/lib/nodes/CMakeLists.txt
+++ b/lib/nodes/CMakeLists.txt
@@ -23,7 +23,7 @@
 set(NODE_SRC
     influxdb.c
     stats.c
-    signal_generator.c    
+    signal_generator.c
 )
 
 if(LIBNL3_ROUTE_FOUND)
@@ -31,11 +31,11 @@ if(LIBNL3_ROUTE_FOUND)
     list(APPEND INCLUDE_DIRS LIBNL3_ROUTE_INCLUDE_DIRS)
 endif()
 
-if(WITH_IO)
+if(LIBNL3_ROUTE_FOUND AND WITH_IO)
     list(APPEND NODE_SRC
         test_rtt.c
         file.c
-        socket.c    
+        socket.c
     )
 endif()
 
@@ -49,7 +49,7 @@ endif()
 # Enable shared memory node-type
 if(HAS_SEMAPHORE AND HAS_MMAN)
     list(APPEND NODE_SRC shmem.c)
-    
+
     if(CMAKE_SUSTEM_NAME STREQUAL Linux)
         list(APPEND LIBRARIES rt)
     endif()
diff --git a/tools/conf2json.cpp b/tools/conf2json.cpp
index 1a6a4e275..e5764be4b 100644
--- a/tools/conf2json.cpp
+++ b/tools/conf2json.cpp
@@ -25,6 +25,7 @@
 #include <jansson.h>
 #include <libconfig.h>
 
+#include <villas/config.h>
 #include <villas/config_helper.h>
 #include <villas/utils.h>