56de2bcd43
https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948 this can do it nicely. Signed-off-by: Anton Arapov <anton@deadbeef.mx>
8 lines
181 B
Nix
8 lines
181 B
Nix
{ lib, config, ... }: {
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options.foo = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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};
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config.foo = lib.mkIf (config ? value) config.value;
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}
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