diff --git a/pkgs/tools/text/ucg/default.nix b/pkgs/tools/text/ucg/default.nix
index d19379477d6c..a509fc629742 100644
--- a/pkgs/tools/text/ucg/default.nix
+++ b/pkgs/tools/text/ucg/default.nix
@@ -1,19 +1,20 @@
-{ lib, stdenv
+{ lib
+, stdenv
 , fetchFromGitHub
-, pkg-config
 , autoreconfHook
+, pkg-config
 , pcre
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "ucg";
-  version = "0.3.3+date=2019-02-25";
+  version = "unstable-2019-02-25";
 
   src = fetchFromGitHub {
     owner = "gvansickle";
-    repo = pname;
+    repo = "ucg";
     rev = "c3a67632f1e3f332bfb102f0db167f34a2e42da7";
-    sha256 = "sha256-/wU1PmI4ejlv7gZzZNasgROYXFiDiIxE9BFoCo6+G5Y=";
+    hash = "sha256-/wU1PmI4ejlv7gZzZNasgROYXFiDiIxE9BFoCo6+G5Y=";
   };
 
   nativeBuildInputs = [
@@ -40,7 +41,7 @@ stdenv.mkDerivation rec {
     runHook postInstallCheck
   '';
 
-  meta = with lib; {
+  meta =  {
     homepage = "https://github.com/gvansickle/ucg/";
     description = "Grep-like tool for searching large bodies of source code";
     longDescription = ''
@@ -49,10 +50,10 @@ stdenv.mkDerivation rec {
       command-line compatible with Ack, to some extent with ag, and where
       appropriate with grep. Search patterns are specified as PCRE regexes.
     '';
-    license = licenses.gpl3Plus;
-    maintainers = with maintainers; [ AndersonTorres ];
-    platforms = with platforms; unix;
+    license = lib.licenses.gpl3Plus;
+    maintainers = with lib.maintainers; [ AndersonTorres ];
+    platforms = lib.platforms.unix;
     broken = stdenv.isAarch64; # cpuid.h: no such file or directory
   };
-}
+})
 # TODO: report upstream