diff --git a/guix/scripts/describe.scm b/guix/scripts/describe.scm
index 7a2dbc453a..ea982955da 100644
--- a/guix/scripts/describe.scm
+++ b/guix/scripts/describe.scm
@@ -31,6 +31,7 @@ (define-module (guix scripts describe)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-37)
   #:use-module (ice-9 match)
+  #:use-module (ice-9 format)
   #:autoload   (ice-9 pretty-print) (pretty-print)
   #:use-module (web uri)
   #:export (display-profile-content
diff --git a/guix/scripts/system.scm b/guix/scripts/system.scm
index 212b49f008..d9cf45da23 100644
--- a/guix/scripts/system.scm
+++ b/guix/scripts/system.scm
@@ -74,6 +74,7 @@ (define-module (guix scripts system)
   #:use-module (srfi srfi-34)
   #:use-module (srfi srfi-35)
   #:use-module (srfi srfi-37)
+  #:use-module (ice-9 format)
   #:use-module (ice-9 match)
   #:use-module (rnrs bytevectors)
   #:export (guix-system