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+```bash
+# PROBLEM
+pyenv virtualenv 3.9.0 foo-3.9.0
+poetry install # won't install packages to the new virtualenv!
+
+# SOLUTION
+pyenv virtualenv 3.9.0 foo-3.9.0
+export VIRTUAL_ENV="$(pyenv virtualenv-prefix)/envs/foo-3.9.0"
+poetry install # installs packages to the new virtualenv
+```
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