nix-helpers: 7fbcd1025b1003a19b544f70945faf23bb90708a

     1: # Remove cruft, like "override" and "overrideDerivation". These are inserted
     2: # into attrsets automatically by functions like callPackage, but since they're
     3: # functions, they can't be converted to strings and hence they can break things
     4: # like build environments (which are assumed to be name/value env vars).
     5: { lib }:
     6: 
     7: with builtins;
     8: with lib;
     9: with rec {
    10:   go = as:
    11:     if isAttrs as then mapAttrs (n: go) (filterAttrs notOverride as) else as;
    12: 
    13:   notOverride = n: v: !(elem n [ "override" "overrideDerivation" ]);
    14: };
    15: go