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-rw-r--r--guix/import/cran.scm4
1 files changed, 2 insertions, 2 deletions
diff --git a/guix/import/cran.scm b/guix/import/cran.scm
index 4e1ce7c010..69d01b5f7c 100644
--- a/guix/import/cran.scm
+++ b/guix/import/cran.scm
@@ -200,11 +200,11 @@ bioconductor package NAME, or #F if the package is unknown."
;; Little helper to download URLs only once.
(define download
(memoize
- (lambda* (url #:key method)
+ (lambda* (url #:key method (ref '()))
(with-store store
(cond
((eq? method 'git)
- (latest-repository-commit store url))
+ (latest-repository-commit store url #:ref ref))
((eq? method 'hg)
(call-with-temporary-directory
(lambda (dir)