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-rw-r--r--build-aux/hydra/gnu-system.scm6
1 files changed, 3 insertions, 3 deletions
diff --git a/build-aux/hydra/gnu-system.scm b/build-aux/hydra/gnu-system.scm
index 16fa4941c1..d7bdb2d7e4 100644
--- a/build-aux/hydra/gnu-system.scm
+++ b/build-aux/hydra/gnu-system.scm
@@ -130,8 +130,8 @@ SYSTEM."
                   (fold-packages (lambda (package result)
                                    (if (member package base-packages)
                                        result
-                                       (append (package-job store (job-name package)
-                                                            package system)
-                                               result)))
+                                       (cons (package-job store (job-name package)
+                                                          package system)
+                                             result)))
                                  (cross-jobs system)))
                 systems)))