Error using jupyter-book (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64'))

Describe the bug

When I try to build my jupyter-book, I get an error. Other people working on the same git-repo don’t get the same error. I am working on a M1 Mac and have installed python through homebrew.

This is the error message I get

$ jupyter-book build mybook
sphinx.errors.ExtensionError: Could not import extension myst_nb (exception: dlopen(PATH1, 0x0002): tried: 'PATH1' (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64')), 'PATH2' (no such file), 'PATH1' (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64')))

Reproduce the bug

1. Use a M1 Mac
2. (Install brew if not installed)
3. Open terminal of choice
4. Write “brew install python”
5. Write “pip install jupyter-book”
6. Write “jupyter build <your-jupyter-book>”

List your environment

Ironically, I cannot even use jupyter-book --version, as I get the same error.

jupyter-book-0.13.1

[jacobInav]

It didn’t work, but I found a solution. I uninstalled all packages and then cleaned the cache. Didn’t know pip kept a cache after the packages are uninstalled. Then I uninstalled python and reinstalled everything in the terminal running on arm64. Thanks for the help!

[stevejpurves]

ok, glad you got past it!