diff --git a/pkgs/development/libraries/qt-5/qt-env.nix b/pkgs/development/libraries/qt-5/qt-env.nix
index 728761689b42..49585f601d14 100644
--- a/pkgs/development/libraries/qt-5/qt-env.nix
+++ b/pkgs/development/libraries/qt-5/qt-env.nix
@@ -13,9 +13,9 @@ buildEnv {
     cat >"$out/bin/qt.conf" <<EOF
     [Paths]
     Prefix = $out
-    Plugins = $qtPluginPrefix
-    Qml2Imports = $qtQmlPrefix
-    Documentation = $qtDocPrefix
+    Plugins = ${qtbase.qtPluginPrefix}
+    Qml2Imports = ${qtbase.qtQmlPrefix}
+    Documentation = ${qtbase.qtDocPrefix}
     EOF
   '';
 }