$ stack install stack-tag
Error: While constructing the build plan, the following exceptions were encountered:
In the dependencies for stack-tag-0.2.0:
hasktags needed, but the stack configuration has no specified version (latest matching version is 0.70.1)
needed since stack-tag is a build target.
Some different approaches to resolving this:
* Consider trying 'stack solver', which uses the cabal-install solver to attempt to find some working build configuration. This can be convenient when dealing with many complicated constraint
errors, but results may be unpredictable.
* Recommended action: try adding the following to your extra-deps in /home/christopher/.stack/global-project/stack.yaml:
- hasktags-0.70.1
Plan construction failed.