mu-overlay

  nixpkgs.overlays = [ (self: super: {
    mu = with self; stdenv.lib.overrideDerivation
    (super.mu.override { gmime = gmime3; }) (attrs: rec {
      src = super.fetchFromGitHub {
        owner  = "djcb";
        repo   = "mu";
        rev    = "53c1b0a06956a151b9176cb8cce26261c1420c76";
        sha256 = "02x7fqv3xdjsw44ks5z1z764hpsx645gjljh824cbvf6macksilj";
      };
    });
  }) ];