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quasicomputational authored
This restricts the solver to a closed set of packages. Previously, even with freeze files, there was no good way to instruct cabal-install to avoid pulling in extra, unconstrained packages. `--reject-unconstrained-dependencies=all` forces the solver to stay within the set of packages that are either local packages, explicit goals, or which are explicitly constrained in configuration files or via the `--constraint` flag Closes #2568.