diff --git a/pkgs/by-name/pa/pango/package.nix b/pkgs/by-name/pa/pango/package.nix
index 0f6edca0299a..964396c84070 100644
--- a/pkgs/by-name/pa/pango/package.nix
+++ b/pkgs/by-name/pa/pango/package.nix
@@ -83,7 +83,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   # Fontconfig error: Cannot load default config file
-  FONTCONFIG_FILE = makeFontsConf {
+  env.FONTCONFIG_FILE = makeFontsConf {
     fontDirectories = [ freefont_ttf ];
   };