core-updates: fonts-dir-builder fails

[Ricardo Wurmus <rekado@elephly.net>]

Hi Guix,

I’m trying to install python-wrapper on core-updates:

--8<---------------cut here---------------start------------->8---
guix package -i python-wrapper
guix package: warning: Your Guix installation is 17 days old.
guix package: warning: Consider running 'guix pull' followed by
'guix package -u' to get up-to-date packages and security updates.

The following package will be installed:
   python-wrapper	3.5.3	/gnu/store/v4i3zfiwk6vl0mhdz580diqs0p6sc8vg-python-wrapper-3.5.3

The following derivations will be built:
   /gnu/store/md131pdqsvxmxna3ndwd5334x6876m54-profile.drv
   /gnu/store/z67djrjh1qkwjf5fyn1k2bzzklb8a6x4-gtk-icon-themes.drv
   /gnu/store/yw7yyw2dsigyl65vmmgigq50mk8l28qi-info-dir.drv
   /gnu/store/wrk9iiqlj4rhdhypsyjs4q6zc8yjk22z-gtk-im-modules.drv
   /gnu/store/c782skai641dhjkmfwhsi6wzh6m4h966-xdg-desktop-database.drv
   /gnu/store/921c4xby2clrimhmww4ky1m8kzhlvp9c-xdg-mime-database.drv
   /gnu/store/8j5bll1y0c3zrifrp984gd3gfarf0ra4-fonts-dir.drv
   /gnu/store/mlakmrr26ypn5ngchi7zjh90i6r6849b-manual-database.drv
Backtrace:
In ice-9/boot-9.scm:
 160: 14 [catch #t #<catch-closure 8c5e00> ...]
In unknown file:
   ?: 13 [apply-smob/1 #<catch-closure 8c5e00>]
In ice-9/boot-9.scm:
  66: 12 [call-with-prompt prompt0 ...]
In ice-9/eval.scm:
 432: 11 [eval # #]
In ice-9/boot-9.scm:
2412: 10 [save-module-excursion #<procedure 8e67c0 at ice-9/boot-9.scm:4084:3 ()>]
4089: 9 [#<procedure 8e67c0 at ice-9/boot-9.scm:4084:3 ()>]
1734: 8 [%start-stack load-stack #<procedure 8f6c60 at ice-9/boot-9.scm:4080:10 ()>]
1739: 7 [#<procedure 8f86c0 ()>]
In unknown file:
   ?: 6 [primitive-load "/gnu/store/k7nyk3yaxi4b9y184232x7i1anxfhrbb-fonts-dir-builder"]
In ice-9/boot-9.scm:
 778: 5 [for-each #<procedure 1b266c0 at ice-9/eval.scm:416:20 (a)> #]
In ice-9/r4rs.scm:
  90: 4 [dynamic-wind #<procedure 1b26690 at ice-9/eval.scm:416:20 ()> ...]
In ice-9/eval.scm:
 432: 3 [eval # #]
 399: 2 [eval # #]
In ./guix/build/utils.scm:
 162: 1 [call-with-ascii-input-file "fonts.scale" ...]
In unknown file:
   ?: 0 [open-file "fonts.scale" "rb"]

ERROR: In procedure open-file:
ERROR: In procedure open-file: No such file or directory: "fonts.scale"
builder for `/gnu/store/8j5bll1y0c3zrifrp984gd3gfarf0ra4-fonts-dir.drv' failed with exit code 1
cannot build derivation `/gnu/store/md131pdqsvxmxna3ndwd5334x6876m54-profile.drv': 1 dependencies couldn't be built
guix package: error: build failed: build of `/gnu/store/md131pdqsvxmxna3ndwd5334x6876m54-profile.drv' failed
--8<---------------cut here---------------end--------------->8---

Could this be because (@@ (guix profiles) fonts-dir-file) first deletes
the file and then checks if the file is empty?

-- 
Ricardo

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