override

packageOverrides = super: let self = super.pkgs; in {
    wlc = super.wlc.overrideDerivation (old: {
       name = "wlc-0.0.10";
       src = pkgs.fetchFromGitHub { 
       owner = "Cloudef";
       repo = "wlc";
       rev = "v0.0.10";
          fetchSubmodules = true;
          sha256 = "09kvwhrpgkxlagn9lgqxc80jbg56djn29a6z0n6h0dsm90ysyb2k";
       };
   });
 };