diff --git a/ext/openal/meson.build b/ext/openal/meson.build
index f0840b2a9ec0abfba4e808e4f2e7450aac44dc80..32fcfeb13384feafa11081bb6a32c036c4373a01 100644
--- a/ext/openal/meson.build
+++ b/ext/openal/meson.build
@@ -4,7 +4,7 @@ if openal_dep.found()
   gstopenal = library('gstopenal',
     'gstopenal.c', 'gstopenalsink.c', 'gstopenalsrc.c',
     c_args: gst_plugins_bad_args,
-    include_directories: [configinc],
+    include_directories: [configinc, libsinc],
     dependencies: [gstaudio_dep, openal_dep],
     install: true,
     install_dir: plugins_install_dir,
diff --git a/ext/opencv/gsttemplatematch.cpp b/ext/opencv/gsttemplatematch.cpp
index a41e69ee03bb6f5b28164377420b9b1976ec01b9..b6d56de70ca830ee5b40464755dbdedeff275d9e 100644
--- a/ext/opencv/gsttemplatematch.cpp
+++ b/ext/opencv/gsttemplatematch.cpp
@@ -61,7 +61,7 @@
 #  include <config.h>
 #endif
 
-#include "../../gst-libs/gst/gst-i18n-plugin.h"
+#include <gst/gst-i18n-plugin.h>
 #include "gsttemplatematch.h"
 #include <opencv2/imgproc.hpp>
 #if (CV_MAJOR_VERSION >= 4)
diff --git a/ext/opencv/meson.build b/ext/opencv/meson.build
index a1a09b1ed70e78b08ee24feab16ee70d915fdb9b..9900d8a65b2fe01fa3d5643d6892d58f67643e3c 100644
--- a/ext/opencv/meson.build
+++ b/ext/opencv/meson.build
@@ -104,7 +104,7 @@ if opencv_found
     gstopencv_sources,
     cpp_args : gst_plugins_bad_args + gstopencv_cargs + [ '-DGST_USE_UNSTABLE_API' ],
     link_args : noseh_link_args,
-    include_directories : [configinc],
+    include_directories : [configinc, libsinc],
     dependencies : [gstbase_dep, gstvideo_dep, opencv_dep, gstopencv_dep],
     install : true,
     install_dir : plugins_install_dir,
diff --git a/ext/sndfile/meson.build b/ext/sndfile/meson.build
index 9748626a1b62d0b14f1fc4224dcf31468c5efb70..91312febd1b09813c966945c0495e3415a7695b4 100644
--- a/ext/sndfile/meson.build
+++ b/ext/sndfile/meson.build
@@ -4,7 +4,7 @@ if sndfile_dep.found()
   gstsndfile = library('gstsndfile',
     'gstsf.c', 'gstsfdec.c', # 'gstsfsink.c', 'gstsfsrc.c',
     c_args: gst_plugins_bad_args,
-    include_directories: [configinc],
+    include_directories: [configinc, libsinc],
     dependencies: [gstaudio_dep, gst_dep, sndfile_dep],
     install: true,
     install_dir: plugins_install_dir,