You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

lxml
1.1alpha

This version was deleted from PyPI around 2023-12-31. Installing fails with:
$ pip3 install lxml==1.1alpha ERROR: Could not find a version that satisfies the requirement lxml==1.1alpha
View other deleted versions of lxml

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2023-12-29/ \ lxml==1.1alpha
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
lxml-1.1alpha-py2.3-linux-i686.egg (171.9KB)
lxml-1.1alpha-py2.4-freebsd-6.1-RELEASE-i386.egg (189.7KB)
lxml-1.1alpha-py2.4-linux-i686.egg (171.8KB)
lxml-1.1alpha-py2.4-linux-x86_64.egg (182.4KB)
lxml-1.1alpha-py2.4-static-win32.egg (1.2MB)
lxml-1.1alpha-py2.4-win32.egg (160.8KB)
lxml-1.1alpha.tar.gz (402.8KB)
lxml-1.1alpha.win32-py2.4.exe (216.9KB)
lxml-1.1alpha.win32-static-py2.4.exe (1.3MB)