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-rw-r--r--guix/grafts.scm6
1 files changed, 6 insertions, 0 deletions
diff --git a/guix/grafts.scm b/guix/grafts.scm
index af469575db..6bec999ad2 100644
--- a/guix/grafts.scm
+++ b/guix/grafts.scm
@@ -189,6 +189,12 @@ available."
(guard (c ((nix-protocol-error? c)
;; As a last resort, build DRV and query the references of the
;; build result.
+
+ ;; Warm up the narinfo cache, otherwise each derivation build
+ ;; will result in one HTTP request to get one narinfo, which is
+ ;; much less efficient than fetching them all upfront.
+ (substitution-oracle store (list drv))
+
(and (build-derivations store (list drv))
(map (cut references store <>) items))))
(references/substitutes store items)))