stderr: Could not find a version that satisfies the requirement deepmerger (from tailon) (from versions: )
No matching distribution found for deepmerger (from tailon)
$ pip search deepmerger
$ pip search deepmerge
deepmerge (0.0.4) - a toolset to deeply merge python dictionaries.
This typo prevents installation. Introduced in PR 50: https://github.com/gvalkov/tailon/pull/50/files#diff-2eeaed663bd0d25b7e608891384b7298R13