{
  nixpkgs.overlays = [
    (self: super: {
      usermgr = self.callPackage ../packages/usermgr { };

      scalasca = self.callPackage ../packages/scalasca { };
      scorep = self.callPackage ../packages/scorep { };

      openmpi = self.callPackage ../packages/openmpi { };

      pdtoolkit = self.callPackage ../packages/pdtoolkit { };
      tau = self.callPackage ../packages/tau { };
    })
  ];
}