- [x] I am on the [latest](https://github.com/python-poetry/poetry/releases/latest) Poetry version. - [x] I have searched the [issues](https://github.com/python-poetry/poetry/issues) of this repo and believe that this is not a duplicate. - [x] If an exception occurs when executing a command, I executed it again in debug mode (`-vvv` option). - **OS version and name**: MAC OSX 10.15.6, Debian 9/10 - **Poetry version**: NA ## Issue The installer is installing `1.1.0rc1` even when `POETRY_PREVIEW==0`. This will force people to download a preview/RC version prematurely.