diff --git a/pkgs/development/libraries/gstreamer/core/default.nix b/pkgs/development/libraries/gstreamer/core/default.nix
index da15755355d..da6a8c7a74a 100644
--- a/pkgs/development/libraries/gstreamer/core/default.nix
+++ b/pkgs/development/libraries/gstreamer/core/default.nix
@@ -34,8 +34,8 @@ stdenv.mkDerivation rec {
   '';
 
   postInstall = ''
-    for prog in "$out/bin/"*; do
-        wrapProgram "$prog" --prefix GST_PLUGIN_SYSTEM_PATH : "\$(unset _tmp; for profile in \$NIX_PROFILES; do _tmp="\$profile/lib/gstreamer-1.0''$\{_tmp:+:\}\$_tmp"; done; printf "\$_tmp")"
+    for prog in "$dev/bin/"*; do
+        wrapProgram "$prog" --suffix GST_PLUGIN_SYSTEM_PATH : "\$(unset _tmp; for profile in \$NIX_PROFILES; do _tmp="\$profile/lib/gstreamer-1.0''$\{_tmp:+:\}\$_tmp"; done; printf "\$_tmp")"
     done
   '';