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-rw-r--r--guix/packages.scm7
1 files changed, 6 insertions, 1 deletions
diff --git a/guix/packages.scm b/guix/packages.scm
index 3e50260069..1769238b5e 100644
--- a/guix/packages.scm
+++ b/guix/packages.scm
@@ -927,7 +927,12 @@ to (see 'graft-derivation'.)"
#:native? #f))
'()))
- (append native-grafts target-grafts))
+ ;; We can end up with several identical grafts if we stumble upon packages
+ ;; that are not 'eq?' but map to the same derivation (this can happen when
+ ;; using things like 'package-with-explicit-inputs'.) Hence the
+ ;; 'delete-duplicates' call.
+ (delete-duplicates
+ (append native-grafts target-grafts)))
(define* (package-grafts store package
#:optional (system (%current-system))