final: prev: { keycloak = prev.keycloak.overrideAttrs (oldAttrs: rec { version = "999.0.0-SNAPSHOT"; src = prev.fetchzip { url = "https://github.com/keycloak/keycloak/releases/download/nightly/keycloak-${version}.zip"; hash = "sha256-2rOhBmPXQy6HK3CtG/7E2EUK5zEWrJtSgBg6AMw2q3E="; }; }); }