Document new pip install flag (#1897)

See [this thead](https://github.com/archlinux/archinstall/issues/1734#issuecomment-1605709792) 

Including `--break-operating-system` flag in `pip install` instructions in doc.

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 15afdda4..9d6fecd9 100644
--- a/README.md
+++ b/README.md
@@ -207,7 +207,7 @@ you can replace the version of archinstall with a new version and run that with
 4. Now clone the latest repository with `git clone https://github.com/archlinux/archinstall`
 5. Enter the repository with `cd archinstall`
    *At this stage, you can choose to check out a feature branch for instance with `git checkout v2.3.1-rc1`*
-6. Build the project and install it using `pip install`
+6. Build the project and install it using `pip install --break-operating-system .`
 
 After this, running archinstall with `python -m archinstall` will run against whatever branch you chose in step 5.