jmd pushed a commit to branch wip-installer
in repository guix.

commit 938e221586d0d4d9d9ab71359696ac6b4c581eb8
Author: Andy Patterson <[email protected]>
Date:   Wed Dec 14 00:03:23 2016 -0500

    gnu: sane-backends: Disable backend generation.
    
    * gnu/packages/scanner.scm (sane-backends)[arguments]: Add a phase to
    disable the compilation of backends.
    
    Signed-off-by: Ludovic Courtès <[email protected]>
---
 gnu/packages/scanner.scm |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gnu/packages/scanner.scm b/gnu/packages/scanner.scm
index 76817b3..01db5ee 100644
--- a/gnu/packages/scanner.scm
+++ b/gnu/packages/scanner.scm
@@ -47,6 +47,10 @@
      `(#:tests? #f
        #:phases
        (modify-phases %standard-phases
+         (add-before 'configure 'disable-backends
+           (lambda _
+             (setenv "BACKENDS" " ")
+             #t))
          (add-after
           'install 'install-udev-rules
           (lambda* (#:key outputs #:allow-other-keys)

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