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4a053bfdfd
all the primops. This allows Nix expressions to test for new primops and take appropriate action if they're not available. For instance, rather than calling a primop `foo' directly, they could say `if builtins ? foo then builtins.foo ... else ...'.
13 lines
225 B
Nix
13 lines
225 B
Nix
assert builtins ? currentSystem;
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assert !builtins ? __currentSystem;
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let {
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x = if builtins ? dirOf then builtins.dirOf /foo/bar else "";
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y = if builtins ? fnord then builtins.fnord "foo" else "";
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body = x + y;
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}
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