This bug should have been fixed with commit d88ff09ea3138fc85c1 (services: 'references-file' depends on Guile-Gcrypt.):
https://git.savannah.gnu.org/cgit/guix.git/commit/?id=d88ff09ea3138fc85c1463b0b345bd6ba71ca568 Have you upgraded your Guix (by using `guix pull`) to include that commit? If you still have the bug after upgrading to include the fix, please share the output of `guix describe`.
