diff --git a/pkgs/misc/emulators/cdemu/analyzer.nix b/pkgs/misc/emulators/cdemu/analyzer.nix
index 30d622ca46fb..5962102d58bc 100644
--- a/pkgs/misc/emulators/cdemu/analyzer.nix
+++ b/pkgs/misc/emulators/cdemu/analyzer.nix
@@ -1,15 +1,15 @@
-{ callPackage, gtk3, libxml2, gnuplot, makeWrapper, stdenv }:
+{ callPackage, gtk3, glib, libxml2, gnuplot, makeWrapper, stdenv }:
 let pkg = import ./base.nix {
   version = "3.0.0";
   pkgName = "image-analyzer";
   pkgSha256 = "1rb3f7c08dxc02zrwrkfvq7qlzlmm0kd2ah1fhxj6ajiyshi8q4v";
 };
 in callPackage pkg {
-  buildInputs = [ gtk3 libxml2 gnuplot (callPackage ./libmirage.nix {}) makeWrapper ];
+  buildInputs = [ glib gtk3 libxml2 gnuplot (callPackage ./libmirage.nix {}) makeWrapper ];
   drvParams = {
     postFixup = ''
       wrapProgram $out/bin/image-analyzer \
-        --set XDG_DATA_DIRS "$out/share:${gtk3}/share/gsettings-schemas/${gtk3.name}:$XDG_DATA_DIRS"
+        --prefix XDG_DATA_DIRS : "$out/share:$GSETTINGS_SCHEMAS_PATH:$XDG_DATA_DIRS"
     '';
   };
 }
diff --git a/pkgs/misc/emulators/cdemu/gui.nix b/pkgs/misc/emulators/cdemu/gui.nix
index 44c128e8c209..825c82d8de20 100644
--- a/pkgs/misc/emulators/cdemu/gui.nix
+++ b/pkgs/misc/emulators/cdemu/gui.nix
@@ -11,7 +11,7 @@ in callPackage pkg {
       wrapProgram $out/bin/gcdemu \
         --set PYTHONPATH "$PYTHONPATH" \
         --set GI_TYPELIB_PATH "$GI_TYPELIB_PATH" \
-        --set XDG_DATA_DIRS "$out/share:$XDG_DATA_DIRS"
+        --prefix XDG_DATA_DIRS : "$out/share:$GSETTINGS_SCHEMAS_PATH:$XDG_DATA_DIRS"
     '';
     # TODO AppIndicator
   };