Ergonomic, hermetic, user-friendly software build system for Python, Go, Java, Kotlin, Protobuf, Scala, Shell. Pants lets you fearlessly scale up your codebase!

Pants

<https://github.com/pantsbuild/pants/issues/18555|#18555 python_requirements Environment Markers Support>
Issue created by <https://github.com/nikwotton|nikwotton>
*Describe the bug*  
Generating a lockfile using the same dependency listed twice with different environment markers fails.

*Pants version*  
2.15.0

*OS*  
MacOS and Linux in Docker

*Additional info*  
I have an example repository setup for simplifying problems with pants. The exact scenario described above is demonstrated on this branch: <https://github.com/nikwotton/Broken-Pants-Demo/tree/broken-lockfiles|https://github.com/nikwotton/Broken-Pants-Demo/tree/broken-lockfiles>  
The same behavior is observed whether using `python_requirements` and requirements.txt, or using `python_requirement` blocks.
<https://github.com/pantsbuild/pants|pantsbuild/pants>