(source (origin
                     (method git-fetch)
                     (uri (git-reference
                           (url "git://git.sv.gnu.org/hurd/glibc")
                           (commit "bdb7a18d78b04ac3ef7a2d905485500f13bb69fb")))
                     (sha256
                      (base32
                       "0v4hy6yimshbvhbhdbbjdir5fm3xr56zj3lnpf01d4nfa0c1h8k1"))
                     (patches (list (search-patch "glibc-make-4.0.patch"))) ;; <-- if you comment this out it works as expected
                    ))