diff --git a/pkgs/by-name/si/sile/package.nix b/pkgs/by-name/si/sile/package.nix
index 3d8b5c8f60e5..7981bc0ee861 100644
--- a/pkgs/by-name/si/sile/package.nix
+++ b/pkgs/by-name/si/sile/package.nix
@@ -161,7 +161,7 @@ stdenv.mkDerivation (finalAttrs: {
             poppler-utils
             finalAttrs.finalPackage
           ];
-          inherit (finalAttrs) FONTCONFIG_FILE;
+          env.FONTCONFIG_FILE = finalAttrs.env.FONTCONFIG_FILE;
         }
         ''
           output=$(mktemp -t selfcheck-XXXXXX.pdf)