anchor.diff:  
     ised = callPackage ../tools/misc/ised {};
   
  -  isl = isl_0_15;
  +  isl = self.isl_0_15;
     isl_0_11 = callPackage ../development/libraries/isl/0.11.1.nix { };
     isl_0_12 = callPackage ../development/libraries/isl/0.12.2.nix { };
     isl_0_14 = callPackage ../development/libraries/isl/0.14.1.nix { };
  
positive.code: 
    iperf2 = callPackage ../tools/networking/iperf/2.nix { };
    iperf3 = callPackage ../tools/networking/iperf/3.nix { };
    iperf = iperf3;
  
    ipfs = goPackages.ipfs.bin // { outputs = [ "bin" ]; };
  
    ipmitool = callPackage ../tools/system/ipmitool {
      static = false;
  
negative.code: 
    # Make bdb5 the default as it is the last release under the custom
    # bsd-like license
    db = self.db5;
    db4 = self.db48;
    db44 = callPackage ../development/libraries/db/db-4.4.nix { };
    db45 = callPackage ../development/libraries/db/db-4.5.nix { };
    db47 = callPackage ../development/libraries/db/db-4.7.nix { };
    db48 = callPackage ../development/libraries/db/db-4.8.nix { };
    db5 = self.db53;
    db53 = callPackage ../development/libraries/db/db-5.3.nix { };
    db6 = self.db60;
    db60 = callPackage ../development/libraries/db/db-6.0.nix { };
  
    dbus = callPackage ../development/libraries/dbus { };
    dbus_cplusplus  = callPackage ../development/libraries/dbus-cplusplus { };
    dbus_glib       = callPackage ../development/libraries/dbus-glib { };
    dbus_java       = callPackage ../development/libraries/java/dbus-java { };
    dbus_python     = self.pythonPackages.dbus;
  
    dbus-sharp-1_0 = callPackage ../development/libraries/dbus-sharp/dbus-sharp-1.0.nix { };
    dbus-sharp-2_0 = callPackage ../development/libraries/dbus-sharp { };
  