a : let lib = a.lib; fetchurl = a.fetchurl; version = lib.getAttr ["version"] "" a; buildInputs = with a; [ ]; in rec { src = /* Here a fetchurl expression goes */; inherit buildInputs; configureFlags = []; /* doConfigure should be removed if not needed */ phaseNames = ["doConfigure" "doMakeInstall"]; name = "${abort "Specify name"}-" + version; meta = { description = "${abort "Specify description"}"; }; }