diff --git a/pkgs/nim-packages/generic.nix b/pkgs/nim-packages/generic.nix
index 6cc0f5d..9fffa84 100644
--- a/pkgs/nim-packages/generic.nix
+++ b/pkgs/nim-packages/generic.nix
@@ -1,23 +1,29 @@
 { stdenv, nim }:
 
-{ name, src, nimDeps ? [], buildInputs ? [], patches ? [], patchPhase ? "", ... }:
+{ name, src, nimDeps ? [], nativeBuildInputs ? [], buildInputs ? [],
+  patches ? [], patchPhase ? "", ... }:
+
+with stdenv.lib;
 
 let
-  getRecursiveBuildInputs = deps: with stdenv.lib.lists;
-    optionals (deps != []) ((head deps).buildInputs ++
-                            (getRecursiveBuildInputs (head deps).nimDeps) ++
-                            (getRecursiveBuildInputs (tail deps)));
-  recursiveBuildInputs = buildInputs ++ (getRecursiveBuildInputs nimDeps);
+  getRecursiveInputs = getInputsFn: deps:
+    optionals (deps != []) ((getInputsFn (head deps)) ++
+                            (getRecursiveInputs getInputsFn (head deps).nimDeps) ++
+                            (getRecursiveInputs getInputsFn (tail deps)));
+  rNativeBuildInputs =
+    nativeBuildInputs ++ (getRecursiveInputs (i: i.nativeBuildInputs) nimDeps);
+  rBuildInputs =
+    buildInputs ++ (getRecursiveInputs (i: i.buildInputs) nimDeps);
 in
 stdenv.mkDerivation {
   name = name;
   src = src;
   patches = patches;
-  nativeBuildInputs = [ nim ];
-  buildInputs = recursiveBuildInputs;
+  nativeBuildInputs = [ nim ] ++ (filter (i: i != nim) rNativeBuildInputs);
+  buildInputs = rBuildInputs;
   nimDeps = nimDeps;
   patchPhase = patchPhase;
-  LD_LIBRARY_PATH = stdenv.lib.makeLibraryPath recursiveBuildInputs;
+  LD_LIBRARY_PATH = makeLibraryPath (rBuildInputs ++ rNativeBuildInputs);
   buildPhase = ''
     HOME=$TMPDIR
     mkdir -p $HOME/.nimble/pkgs
diff --git a/pkgs/nim-packages/ui.nix b/pkgs/nim-packages/ui.nix
index 3032748..dd908d7 100644
--- a/pkgs/nim-packages/ui.nix
+++ b/pkgs/nim-packages/ui.nix
@@ -18,7 +18,9 @@ buildNimblePackage rec {
     rm ui/libui/darwin/OLD_table.m
   '';
 
-  buildInputs = [ pkg-config gtk3 ];
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [ gtk3 ];
 
   meta = with stdenv.lib; {
     description = "Beginnings of what might become Nim's official UI library";