On Fri, Apr 14, 2017 at 01:13:17PM +0300, Muriithi Frederick Muriuki wrote: > * gnu/packages/python.scm (python-httpretty): New variable. > + (arguments > + `(;; One of ipdb's dependency keeps failing with a response > + ;; of 410, "Gone" > + ;; The dependency seems to have a name "texlive-texmf-2016" > + ;; and seems to be one of texlive's dependencies > + ;; As such, the tests for this will fail due to the missing > + ;; dependency ("python-ipdb" ,python-ipdb) > + #:tests? #f)) When the substituter fails, it should suggest that you re-try the command with '--fallback'. Does it matter that httpretty would be missing this dependency and failing its test suite?