anchor.diff:      rev = "v${version}";
       sha256 = "xvvqzGxgkuGcvnO12jnLURNJUoSlnMw2g/mnII+i6Bs=";
     };
  +
  +  strictDeps = true;
  +
  +  depsBuildBuild = [
  +    pkg-config
  +  ];
   
     nativeBuildInputs = [
       meson
  
positive.code:     "-Dos_backend=linux"
      "-Dsystemdsystemunitdir=${placeholder "out"}/etc/systemd/system"
      "-Dudevrulesdir=${placeholder "out"}/lib/udev/rules.d"
    ];
  
    doCheck = false; # fails with "env: './linux/integration-test': No such file or directory"
  
negative.code: , systemd
  , useIMobileDevice ? true
  , libimobiledevice
  , withDocs ? (stdenv.buildPlatform == stdenv.hostPlatform)
  }:
  
  stdenv.mkDerivation rec {
    pname = "upower";
    version = "0.99.17";
  
    outputs = [ "out" "dev" ]
      ++ lib.optionals withDocs [ "devdoc" ];
  
    src = fetchFromGitLab {
      domain = "gitlab.freedesktop.org";
  