final: prev: { calf = prev.calf.overrideAttrs (old: { src = final.fetchFromGitHub { owner = "calf-studio-gear"; repo = "calf"; rev = "024e9deab2d32b26e90b556d36d9c74f6b0aeb17"; sha256 = "sha256-av6quHkesND9M8vlkOQKLXK4prf+oQxOLANuNsWL+eg="; }; nativeBuildInputs = old.nativeBuildInputs ++ (with final; [automake autoconf pkg-config libtool]); configurePhase = '' $SHELL autogen.sh ''; }); }