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nixpkgs/lib/from-env.nix
Marc Weber d1e87dfc86 adding two new options:
- system.copySystemConfiguration (requested by Ludovic Courtès)
- system.extraSystemBuilderCmds

svn path=/nixos/trunk/; revision=21406
2010-04-28 14:55:26 +00:00

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143 B
Nix

# TODO: remove this file. There is lib.maybeEnv now
name: default:
let value = builtins.getEnv name; in
if value == "" then default else value