Version solving fails for transitive dependencies of another local poetry package

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: OSX 10.14.5
• Poetry version: 0.12.17
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/gusostow/c24ac3d29bb2d8230addebad049f0925

Issue

My poetry package (db_scripts) depends on another local poetry package (lib) that I created also. In the lib package I was able to install psycopg2-binary = "^2.8.3" just fine, but when I try to install lib in db_scripts I get the exception:

[SolverProblemError]
Because no versions of lib match !=0.1.0
 and lib (0.1.0) depends on psycopg2-binary (^2.8.3), every version of lib requires psycopg2-binary (^2.8.3).
So, because no versions of psycopg2-binary match >=2.8.3,<3.0.0
 and db-scripts depends on lib (*), version solving failed.

Which doesn’t make sense because I was able to install it in the other package via poetry just beforehand. And poetry search psycopg2-binary=2.8.3 comes up with the desired result.

Why can I install a package in a poetry project, but not in another poetry project that depends on the first one? Help is appreciated

[tupui]

@finswimmer While recreating a lock file solves the issue. The error message is still confusing and could be improved. I need to handcraft my lock files (because we still cannot exclude some deps which would be wrongly set like enum34 and functools32 with python 3.7) and adding another poetry repo led to the same issue.

[avshyz]

Hi y’all. Like @agoose77, I’ve also encountered the same issue until I’ve called lock