mamba install -c local

[SylvainCorlay]

With conda, -c local will force the installation from the local channel, while with mamba, it will not install anything if there is already a version from a remote channel.

[wolfv]

do you know if conda forces installation only for the local channel or if this is generally the behavior? I think it's generally like that and I am not sure wether I like that because IMO install should be a no-op if the package is already installed. I think with update or --force this should definitely happen though.

[s22chan]

conda install -c local doesn't force: it just adds local as the highest priority channel.
eg:

remote_ver=2, local_ver=1 -> no install
remote_ver=2, local_ver=2 -> install
remote_ver=2, local_ver=3 -> install

conda install local::pkg_name would specifically require the package to be from local. This doesn't work with mamba:

error    libmamba Selected channel specific (or force-reinstall) job, but package is not available from channel. Solve job will fail.

As of now, I'm not sure if mamba has any way of updating an environment with a locally built dev package.