forked from mirrors/nixpkgs
22 lines
665 B
Nix
22 lines
665 B
Nix
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# Elpa only serves the latest version of a given package uncompressed.
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# Once that release is no longer the latest & greatest it gets archived and compressed
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# meaning that both the URL and the hash changes.
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#
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# To work around this issue we fall back to the URL with the .lz suffix and if that's the
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# one we downloaded we uncompress the file to ensure the hash matches regardless of compression.
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{ fetchurl, lzip }:
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{ url, ... }@args: fetchurl ((removeAttrs args [ "url" ]) // {
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urls = [
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url
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(url + ".lz")
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];
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postFetch = ''
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if [[ $url == *.lz ]]; then
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${lzip}/bin/lzip -c -d $out > uncompressed
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mv uncompressed $out
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fi
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'';
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})
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