diff --git a/pkgs/desktops/gnome-3/extensions/system-monitor.nix b/pkgs/desktops/gnome-3/extensions/system-monitor.nix
index f9b13df7f7663..0c3e65633c818 100644
--- a/pkgs/desktops/gnome-3/extensions/system-monitor.nix
+++ b/pkgs/desktops/gnome-3/extensions/system-monitor.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildPhase = ''
-    ${glib}/bin/glib-compile-schemas --targetdir=${uuid}/schemas ${uuid}/schemas
+    ${glib.dev}/bin/glib-compile-schemas --targetdir=${uuid}/schemas ${uuid}/schemas
   '';
 
   installPhase = ''
diff --git a/pkgs/desktops/gnome-3/extensions/volume-mixer.nix b/pkgs/desktops/gnome-3/extensions/volume-mixer.nix
index 845d21f5219d5..1487efe0a23fe 100644
--- a/pkgs/desktops/gnome-3/extensions/volume-mixer.nix
+++ b/pkgs/desktops/gnome-3/extensions/volume-mixer.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
   ];
 
   buildPhase = ''
-    ${glib}/bin/glib-compile-schemas --targetdir=${uuid}/schemas ${uuid}/schemas
+    ${glib.dev}/bin/glib-compile-schemas --targetdir=${uuid}/schemas ${uuid}/schemas
   '';
 
   installPhase = ''