New comment by ahesford on void-packages repository https://github.com/void-linux/void-packages/issues/25606#issuecomment-708612373 Comment: I already have numpy and pandas installed, but reconfiguring shows successful byte compilation: ``` # xbps-reconfigure -f python3-numpy python3-numpy: configuring ... Byte-compiling python3.9 code for module numpy... Updating ldconfig(8) cache... python3-numpy: configured successfully. # xbps-reconfigure -f python3-pandas python3-pandas: configuring ... Byte-compiling python3.9 code for module pandas... Updating ldconfig(8) cache... python3-pandas: configured successfully. ``` Similarly, I can install `python3-Flask-SQLAlchemy` and see no errors about byte-compiling that package or any of its dependencies. Did you upgrade all of the `python3-*` packages alongside `python3`?