@witty-crayon-22786 I’m somewhat lost in graph ambiguity… I switched https://github.com/pantsbuild/pants/blob/master/src/python/pants/backend/python/rules/inject_init.py to use https://github.com/pantsbuild/pants/pull/8268 and as a result get:

Ambiguous rules to compute Get(Digest, DirectoryWithPrefixToStrip) with parameter types (Digest+OptionsBootstrapper+PythonTestsAdaptor):
      (Digest, [DirectoryWithPrefixToStrip], <intrinsic>) for DirectoryWithPrefixToStrip
      Param(Digest)

which confuses me, because I don’t see any places that my change may introduce and ambiguity…