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-rw-r--r--guix/scripts/system.scm28
1 files changed, 16 insertions, 12 deletions
diff --git a/guix/scripts/system.scm b/guix/scripts/system.scm
index 8ea77e4f3c..8e049a4f45 100644
--- a/guix/scripts/system.scm
+++ b/guix/scripts/system.scm
@@ -151,18 +151,22 @@ When GRUB? is true, install GRUB on DEVICE, using GRUB.CFG."
;; Copy items to the new store.
(copy-closure to-copy target #:log-port log-port)))))
- (mlet* %store-monad ((os-dir -> (derivation->output-path os-drv))
- (% (maybe-copy os-dir)))
-
- ;; Create a bunch of additional files.
- (format log-port "populating '~a'...~%" target)
- (populate-root-file-system os-dir target)
-
- (when grub?
- (unless (false-if-exception (install-grub grub.cfg device target))
- (leave (_ "failed to install GRUB on device '~a'~%") device)))
-
- (return #t)))
+ (let ((os-dir (derivation->output-path os-drv))
+ (format (lift %store-monad format))
+ (populate (lift2 %store-monad populate-root-file-system)))
+
+ (mbegin %store-monad
+ (maybe-copy os-dir)
+
+ ;; Create a bunch of additional files.
+ (format log-port "populating '~a'...~%" target)
+ (populate os-dir target)
+
+ (begin
+ (when grub?
+ (unless (false-if-exception (install-grub grub.cfg device target))
+ (leave (_ "failed to install GRUB on device '~a'~%") device)))
+ (return #t)))))
;;;