Solving environment: failed with repodata

[PedroDaPos]

Hello! I was wondering if you could help me figuring out what is the solution for the following error messages. I am following instructions to install dammit via conda, but it initially gives me the following messages:

Collecting package metadata (current_repodata.json): done Solving environment: failed with initial frozen solve. Retrying with flexible solve. Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source. Collecting package metadata (repodata.json): done Solving environment: \

Sometimes it stays in the "solving environment" state for hours. Then I get this error message:

`Found conflicts! Looking for incompatible packages. failed

UnsatisfiableError: The following specifications were found to be incompatible with each other:

Output in format: Requested package -> Available versions`

I updated conda, and even downgraded conda, but was still not able to solve this problem. I was wondering if perhaps this is an issue others may have experienced. Any solution or advice on how to resolve this issue would be greatly appreciated. Thank you in advance!

[camillescott]

Thanks for the report @PedroDaPos! So one issue with dammit v1.x is that the required conda environment is.... reallllly big. So big, that sometimes the dependency solver just gives up -- this especially happens if you try to install dammit into an existing conda environment, as opposed to creating a new conda environment.

The most direct solution is to conda install -c conda-forge mamba in your base environment, and then use mamba instead of conda to install dammit. mamba is a reimplementation of conda in pure C++, with a more efficient dependency solver, and it's MUCH faster than regular conda.

The other solution is wait a couple weeks for when we've pushed out dammit v2, which uses Snakemake and per-task environments, sidestepping the giant tangled environment altogether.