28 lines
823 B
Nix
28 lines
823 B
Nix
# Fetches a chicken egg from henrietta using `chicken-install -r'
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# See: http://wiki.call-cc.org/chicken-projects/egg-index-4.html
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{ stdenv, chicken }:
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{ name, version, md5 ? "", sha256 ? "" }:
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stdenv.mkDerivation {
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name = "chicken-${name}-export";
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builder = ./builder.sh;
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buildInputs = [ chicken ];
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outputHashAlgo = if sha256 == "" then "md5" else "sha256";
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outputHashMode = "recursive";
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outputHash = if sha256 == "" then md5 else sha256;
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inherit version;
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eggName = name;
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impureEnvVars = [
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# We borrow these environment variables from the caller to allow
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# easy proxy configuration. This is impure, but a fixed-output
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# derivation like fetchurl is allowed to do so since its result is
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# by definition pure.
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"http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy"
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];
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}
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