nckx pushed a commit to branch master
in repository guix.

commit f45e314e19c903d2686d11184ecc689ffb444c0a
Author: Tobias Geerinckx-Rice <m...@tobias.gr>
Date:   Thu Dec 21 17:44:03 2017 +0100

    gnu: zstd: Disable unrelated format support.
    
    * gnu/packages/compression.scm (zstd)[arguments]: Add HAVE_LZMA=0 to
---
 gnu/packages/compression.scm | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/compression.scm b/gnu/packages/compression.scm
index 9ddc76f..5cdb14b 100644
--- a/gnu/packages/compression.scm
+++ b/gnu/packages/compression.scm
@@ -1609,7 +1609,13 @@ or junctions, and always follows hard links.")
          (delete 'configure))           ; no configure script
        #:make-flags
        (list "CC=gcc"
-             (string-append "PREFIX=" (assoc-ref %outputs "out")))
+             (string-append "PREFIX=" (assoc-ref %outputs "out"))
+             ;; Skip auto-detection of, and creating a dependency on, the build
+             ;; environment's ‘xz’ for what amounts to a dubious feature 
anyway.
+             "HAVE_LZMA=0"
+             ;; Not currently detected, but be explicit & avoid surprises 
later.
+             "HAVE_LZ4=0"
+             "HAVE_ZLIB=0")
        #:test-target "test"))
     (home-page "http://zstd.net/";)
     (synopsis "Zstandard real-time compression algorithm")

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