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Subject: Re: Package definition - argument, fix for wrong file format before
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On Sat, 21 May 2022 20:16:06 +0200
=E7=99=BD=E3=81=84=E7=86=8A <help-guix_gnu.org@sumou.com> wrote:

> Hello everyone:
>=20
> I'm trying to build some old apps - one of them is an emacs package
> only available now via the archive.org Wayback machine.
>=20
> The problem is though that the download is an xxxx.tar.gz file in
> name - in fact it is really only a tar archive. So guix build fails
> with wrong file format error. Concretely - it is this file:=20
> https://web.archive.org/web/20110104020844/http://taiyaki.org/elisp/mell/=
src/mell-1.0.0.tar.gz
>=20
> I think I should add some "(arguments" lines in the package recipe -=20
> replacing the unpack phase? However not sure exactly how - am
> searching but haven't found any examples fixing for such a problem.
>=20
> Could someone advise me - how to specify the file should be unpacked
> as really just a tar archive so that the build can then proceed?
>=20
> Many thanks.
>=20

If I remember correctly, the source should get passed as part of the
inputs alist? Try this:
`(replace 'unpack (lambda args (display args)))`
And look at what arguments it gets passed. The store path of the
tarball should be right there.