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-rw-r--r--gnu/packages/cdrom.scm3
1 files changed, 3 insertions, 0 deletions
diff --git a/gnu/packages/cdrom.scm b/gnu/packages/cdrom.scm
index 546e1a20d0..cdbe25fe44 100644
--- a/gnu/packages/cdrom.scm
+++ b/gnu/packages/cdrom.scm
@@ -251,6 +251,9 @@ reconstruction capability.")
              "CONFIG_SHELL=sh" "CCOM=gcc"
              (string-append "INS_BASE=" (assoc-ref %outputs "out"))
              (string-append "INS_RBASE=" (assoc-ref %outputs "out")))
+       ;; Parallel builds appear to be unsafe, see
+       ;; https://hydra.gnu.org/build/3346840/log/raw
+       #:parallel-build? #f
        #:phases
        (modify-phases %standard-phases
          (delete 'configure)