diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index 2ce2c27c93..69cb8c878b 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -1023,6 +1023,7 @@ (define* (make-linux-libre* version gnu-revision source supported-systems
               (setenv "KBUILD_BUILD_TIMESTAMP" (getenv "SOURCE_DATE_EPOCH"))
 
               ;; Other variables useful for reproducibility.
+              (setenv "KBUILD_BUILD_VERSION" "1")
               (setenv "KBUILD_BUILD_USER" "guix")
               (setenv "KBUILD_BUILD_HOST" "guix")