smoove: Output is $out and not $bin if outputs hasn't been defined

Not sure why this worked before. Must be more strict now?

pkgs/smoove/default.nix

@@ -15,8 +15,7 @@ buildGoPackage rec {
   };
 
   postFixup = ''
-    declare -p
-    wrapProgram "$bin/bin/smoove"        \
+    wrapProgram "$out/bin/smoove"        \
       --suffix PATH : "${gzip}/bin"      \
       --suffix PATH : "${gsort}/bin"     \
       --suffix PATH : "${htslib}/bin"    \