git.iko.soy/haskell.nix
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haskell.nix/lib/override-with.nix
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1# overrideWith - Allow the user to override the given default path
2# with a NIX_PATH entry.
3override: default:
4 let
5 try = builtins.tryEval (builtins.findFile builtins.nixPath override);
6 in if try.success then
7 builtins.trace "using search host <${override}>" try.value
8 else
9 default