let pkgs = builtins.fetchGit { name = "nixpkgs-2018-11-13"; url = https://github.com/nixos/nixpkgs/; rev = "695a3d4254545968fc3015142c5299c0da5ca0a9"; }; in with (import pkgs {}); let osxdeps = lib.optionals stdenv.isDarwin ( with darwin.apple_sdk.frameworks; [ Cocoa CoreServices ]); deps = [ cmark curl gcc git gmp libsigsegv meson ncurses ninja pkgconfig zlib re2c openssl ]; isGitDir = (path: type: type != "directory" || baseNameOf path != ".git"); in stdenv.mkDerivation { name = "urbit"; src = builtins.filterSource isGitDir ./.; buildInputs = osxdeps ++ deps; mesonFlags = "-Dnix=true"; NIX_LDFLAGS = lib.optionalString stdenv.isDarwin "-framework CoreServices"; }