WIP: getting good

pkgs/development/libraries/gmp/5.1.x.nix

@@ -2,7 +2,7 @@
 
 with { inherit (stdenv.lib) optional; };
 
-stdenv.mkDerivation (rec {
+stdenv.mkDerivation rec {
   name = "gmp-5.1.3";
 
   src = fetchurl { # we need to use bz2, others aren't in bootstrapping stdenv
@@ -10,6 +10,9 @@ stdenv.mkDerivation (rec {
     sha256 = "0q5i39pxrasgn9qdxzpfbwhh11ph80p57x6hf48m74261d97j83m";
   };
 
+  outputs = [ "out" "info" ];
+  buildInputs = [ stdenv.hookLib.multiout ];
+
   nativeBuildInputs = [ m4 ];
 
   configureFlags =
@@ -22,6 +25,7 @@ stdenv.mkDerivation (rec {
     ++ optional (cxx && stdenv.isDarwin) "CPPFLAGS=-fexceptions"
     ++ optional stdenv.is64bit "--with-pic"
     ;
+  dontDisableStatic = withStatic;
 
   doCheck = true;
 
@@ -58,6 +62,4 @@ stdenv.mkDerivation (rec {
     maintainers = [ maintainers.simons ];
   };
 }
-  // stdenv.lib.optionalAttrs withStatic { dontDisableStatic = true; }
-)