/usr/local/bin/stack build --exec haskell-test-exe Error: While constructing the build plan, the following exceptions were encountered: In the dependencies for haskell-test-0.1.0.0: hidden-char needed, but the stack configuration has no specified version (latest matching version is 0.1.0.2) needed since haskell-test is a build target. Some different approaches to resolving this: * Recommended action: try adding the following to your extra-deps in /home/felipelalli/IdeaProjects/haskell-test/stack.yaml: - hidden-char-0.1.0.2@sha256:4aff0d02f90959e84504e420d96da6e1189a456b5c5379474a598d48327cd838,2357 Plan construction failed. Process finished with exit code 1