diff --git a/gnu/packages/telephony.scm b/gnu/packages/telephony.scm
index 0865ab5fe1..6974cfcadb 100644
--- a/gnu/packages/telephony.scm
+++ b/gnu/packages/telephony.scm
@@ -987,6 +987,7 @@ (define-public simtrace-1
               (uri (git-reference
                     (url "https://gitea.osmocom.org/sim-card/simtrace")
                     (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
               (sha256
                (base32
                 "03wjdavp7fbr7jzzhqx6di9v87yvfi19i3kpn798vlpbw7iwkjry"))))