The Sage installation in computop/sage:9.5 has several issues that prevent rebuilding when changes are made to Sage.

I ran into this while setting up computop/sage as a VS Code devcontainer for Sage development, https://trac.sagemath.org/ticket/33671

The issues and workarounds for them are described in:
https://git.sagemath.org/sage.git/diff/.devcontainer/devcontainer-computop-sage.json?id=8ec5393e16da7b211d4ee060b1dc34dc0facae52