diff --git a/gnu/packages/messaging.scm b/gnu/packages/messaging.scm
index 6283db02bf..f78719575a 100644
--- a/gnu/packages/messaging.scm
+++ b/gnu/packages/messaging.scm
@@ -3128,27 +3128,27 @@ (define-public matterbridge
      `(#:phases (modify-phases %standard-phases
                   (delete 'configure)
                   (replace 'build
-                    (lambda _
+                    (lambda* (#:key outputs #:allow-other-keys)
                       (setenv "GOCACHE"
                               (string-append (getcwd) "/go-build"))
                       (setenv "GOBIN"
-                              (string-append (assoc-ref %outputs "out") "/bin"))
+                              (string-append (assoc-ref outputs "out") "/bin"))
                       (invoke "go" "build" "-v" "-x")))
                   (replace 'check
-                    (lambda* (#:key tests? #:allow-other-keys)
+                    (lambda* (#:key outputs tests? #:allow-other-keys)
                       (when tests?
                         (setenv "GOCACHE"
                                 (string-append (getcwd) "/go-build"))
                         (setenv "GOBIN"
-                                (string-append (assoc-ref %outputs "out")
+                                (string-append (assoc-ref outputs "out")
                                                "/bin"))
                         (invoke "go" "test" "-v" "-x"))))
                   (replace 'install
-                    (lambda _
+                    (lambda* (#:key outputs #:allow-other-keys)
                       (setenv "GOCACHE"
                               (string-append (getcwd) "/go-build"))
                       (setenv "GOBIN"
-                              (string-append (assoc-ref %outputs "out") "/bin"))
+                              (string-append (assoc-ref outputs "out") "/bin"))
                       (invoke "go" "install" "-v" "-x"))))))
     (native-inputs (list go))
     (synopsis "Bridge together various messaging networks and protocols")