diff --git a/contrib/guix/manifest.scm b/contrib/guix/manifest.scm
index 59837e9647e..ddc4d05ec33 100644
--- a/contrib/guix/manifest.scm
+++ b/contrib/guix/manifest.scm
@@ -19,6 +19,7 @@
              ((gnu packages python-crypto) #:select (python-asn1crypto))
              ((gnu packages python-science) #:select (python-scikit-build-core))
              ((gnu packages python-xyz) #:select (python-pydantic-2))
+             (gnu packages tcl)
              ((gnu packages tls) #:select (openssl))
              ((gnu packages version-control) #:select (git-minimal))
              (guix build-system cmake)
@@ -547,6 +548,7 @@ inspecting signatures in Mach-O binaries.")
         cmake-minimal
         gnu-make
         ninja
+        tcl
         ;; Scripting
         python-minimal ;; (3.10)
         ;; Git