diff --git a/pkgs/by-name/fl/flwrap/package.nix b/pkgs/by-name/fl/flwrap/package.nix
index e1a4f93a179f..1666191e48a5 100644
--- a/pkgs/by-name/fl/flwrap/package.nix
+++ b/pkgs/by-name/fl/flwrap/package.nix
@@ -16,13 +16,17 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-g1V7bOcgVHpD+Ndn02Nj4I3rGItuQ2qLGlrZZshfGP8=";
   };
 
+  nativeBuildInputs = [
+    pkg-config
+  ];
+
   buildInputs = [
     fltk13
     libjpeg
   ];
 
-  nativeBuildInputs = [
-    pkg-config
+  configureFlags = [
+    "FLTK_CONFIG=${lib.getExe' (lib.getDev fltk13) "fltk-config"}"
   ];
 
   meta = {