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Discussion on: Install python 3.8.0 via pyenv on BigSur

mj profile image
Michael Jackson

Does pyenv install 3.9.0 work for you, then? I've followed all your steps and still get:

michaeljackson@Michaels-MacBook-Pro ~ % pyenv install 3.9.0                                
Downloading openssl-1.1.0j.tar.gz...
Installing openssl-1.1.0j...
Installed openssl-1.1.0j to /Users/michaeljackson/.pyenv/versions/3.9.0

python-build: use readline from homebrew
Downloading Python-3.9.0.tar.xz...
Installing Python-3.9.0...
python-build: use readline from homebrew
python-build: use zlib from xcode sdk

BUILD FAILED (OS X 11.0 using python-build 1.2.21)

Inspect or clean up the working tree at /var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/python-build.20201019140810.65241
Results logged to /var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/python-build.20201019140810.65241.log

Last 10 log lines:
  File "/private/var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/python-build.20201019140810.65241/Python-3.9.0/Lib/ensurepip/", line 210, in _main
    return _bootstrap(
  File "/private/var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/python-build.20201019140810.65241/Python-3.9.0/Lib/ensurepip/", line 129, in _bootstrap
    return _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
  File "/private/var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/python-build.20201019140810.65241/Python-3.9.0/Lib/ensurepip/", line 38, in _run_pip
    return[sys.executable, "-c", code], check=True).returncode
  File "/private/var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/python-build.20201019140810.65241/Python-3.9.0/Lib/", line 524, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['/private/var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/python-build.20201019140810.65241/Python-3.9.0/python.exe', '-c', '\nimport runpy\nimport sys\nsys.path = [\'/var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/tmpzx8xka5t/setuptools-49.2.1-py3-none-any.whl\', \'/var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/tmpzx8xka5t/pip-20.2.3-py2.py3-none-any.whl\'] + sys.path\nsys.argv[1:] = [\'install\', \'--no-cache-dir\', \'--no-index\', \'--find-links\', \'/var/folders/yq/nv901ffx2bx6ynbszjbn46b80000gn/T/tmpzx8xka5t\', \'--root\', \'/\', \'--upgrade\', \'setuptools\', \'pip\']\nrunpy.run_module("pip", run_name="__main__", alter_sys=True)\n']' returned non-zero exit status 1.
make: *** [install] Error 1
michaeljackson@Michaels-MacBook-Pro ~ % 
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craiga profile image
Craig Anderson

For me, the problem was that I needed to have zlib (and possibly openssl@.1.1 and readline) installed from homebrew, and then having the following environment variable set.

export LDFLAGS="-L/usr/local/opt/readline/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/zlib/lib"
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I also had the following set, though I'm not sure if they're required.

export CPPFLAGS="-I/usr/local/opt/readline/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/zlib/include"
export PKG_CONFIG_PATH="/usr/local/opt/readline/lib/pkgconfig:/usr/local/opt/openssl@1.1/lib/pkgconfig:/usr/local/opt/zlib/lib/pkgconfig"
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Hopefully this helps!

codebrotha profile image

Thank you, this worked!

eshack94 profile image
Elijah Shackelford

I'm having this same issue after re-installing pyenv (no issues prior to re-installing, but this is the first time I've needed to re-install after upgrading to Big Sur, so I think it's related). Trying your solution now.

Edit: Just reporting back — this worked for me. Thank you very much.

Others who come across this might also want to install and link bzip2 prior to compiling.


brew install bzip2
export LDFLAGS="-L/usr/local/opt/bzip2/lib"
export CPPFLAGS="-I/usr/local/opt/bzip2/include"
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jaclu profile image
Jacob Lundqvist

This is a snippet I use on all my machines, if you don't always use brew you could always wrap it in an outer check. And yes the -O2 might not be for everybody, then just skip it :)
This one will adhere to whatever location you might have used for Linux Homebrew, on Darwin you would always use /usr/local, since otherwise a lot of brew stuff fails, and it would be a pointless pain to workaround.

comment: Darwin doesn't set this variable, Linux HomeBrew does

if [ "$HOMEBREW_PREFIX" = "" ]; then

comment: Set the env to ensure brew can build stuff

export LDFLAGS="-L$HOMEBREW_PREFIX/opt/zlib/lib -L$HOMEBREW_PREFIX/opt/bzip2/lib"
export CPPFLAGS="-I$HOMEBREW_PREFIX/opt/zlib/include -I$HOMEBREW_PREFIX/opt/bzip2/include"
export CFLAGS="-O2"

kojikanao profile image
Koji (he/him) Author

pyenv install 3.9.0 won't work since there is no 3.9.0.
only 3.9.0b5, 3.9-dev