diff --git a/pkgs/by-name/un/untie/package.nix b/pkgs/by-name/un/untie/package.nix
index 2bb38695f509..8ef7c90e5e3e 100644
--- a/pkgs/by-name/un/untie/package.nix
+++ b/pkgs/by-name/un/untie/package.nix
@@ -4,11 +4,11 @@
   fetchurl,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "untie";
   version = "0.3";
   src = fetchurl {
-    url = "http://guichaz.free.fr/untie/files/${pname}-${version}.tar.bz2";
+    url = "http://guichaz.free.fr/untie/files/${finalAttrs.pname}-${finalAttrs.version}.tar.bz2";
     sha256 = "1334ngvbi4arcch462mzi5vxvxck4sy1nf0m58116d9xmx83ak0m";
   };
 
@@ -19,12 +19,12 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "PREFIX=$(out)" ];
 
-  meta = with lib; {
+  meta = {
     description = "Tool to run processes untied from some of the namespaces";
     mainProgram = "untie";
-    maintainers = with maintainers; [ raskin ];
-    platforms = platforms.linux;
-    license = licenses.gpl2Plus;
+    maintainers = with lib.maintainers; [ raskin ];
+    platforms = lib.platforms.linux;
+    license = lib.licenses.gpl2Plus;
   };
 
   passthru = {
@@ -32,4 +32,4 @@ stdenv.mkDerivation rec {
       downloadPage = "http://guichaz.free.fr/untie";
     };
   };
-}
+})