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