texlive-build-system: phase `build' failed

[Pierre Neidhardt]

I'm working on a bunch of TeXlive packages and I keep running into a few
issues.

1. Does anyone know how to search for the path of a package in TeXlive's
tree without checking out the whole SVN repo?
http://www.tug.org/svn/texlive/tags/texlive-2017.1/ is not so convenient
to browse.

2. Are the package dependencies documented?  For instance
https://www.ctan.org/pkg/needspace requires microtype to build properly,
but that does not seem to be mentioned anywhere on CTAN.

3. The most important issue: I can't get "texlive-build-system" to work.
For instance:

--8<---------------cut here---------------start------------->8---
(define-public texlive-latex-microtype
  (package
    (name "texlive-latex-microtype")
    (version (number->string %texlive-revision))
    (source (origin
              (method svn-fetch)
              (uri (texlive-ref "latex" "microtype"))
              (file-name (string-append name "-" version "-checkout"))
              (sha256
               (base32
                "1dwhlxy35bydlljb40ck6d5j93gd4889hpr4j3x8vqhl46k3lfph"))))
    (build-system texlive-build-system)
    (arguments '(#:tex-directory "latex/microtype"))
    (home-page "https://www.ctan.org/pkg/microtype";)
    (synopsis "Subliminal refinements towards typographical perfection")
    (description
     "Foo")
    (license license:lppl1.3c+)))
--8<---------------cut here---------------end--------------->8---

fails with

--8<---------------cut here---------------start------------->8---
[...]
starting phase `build'
This is LuaTeX, Version 1.0.4 (TeX Live 2017)
 restricted system commands enabled.
phase `build' failed after 1.7 seconds
[...]
--8<---------------cut here---------------end--------------->8---

And nothing else.  Looking at
`/tmp/guix-build-texlive-latex-microtype-44591.drv-1/source/build/microtype.log`
it seems that everything went fine.

Any clue what I'm missing?  Otherwise I'll dig deeper in the definition
of texlive-build-system.

--
Pierre Neidhardt

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