It is better not to override `installPhase` (disregarding hooks) but rely on the generic builder:    ```nix  installTargets = [ "install" "install-systemd" ];  makeFlags = [    "MAN_INSTDIR=${placeholder" out"}/share/man"    "SYSTEMD_SERVICE_INSTDIR=${placeholder" out"}/lib/systemd/system"    "LEDCTL_INSTDIR=${placeholder" out"}/sbin"    "LEDMON_INSTDIR=${placeholder" out"}/sbin"  ];  ```  