pyenvで3.7.xのインストールでエラー( ModuleNotFoundError: No module named ‘_ctypes’)

ROS2の環境構築でpyenvで3.7.xをインストールしようとしたらエラーが発生
最小インストール後に、mac用のWifiドライバーなどを軽く入れたくらいなので、ライブラリが足りなかった。

droid@rc211v-usb:~$ pyenv install 3.7.4
Downloading Python-3.7.4.tar.xz...
-> https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tar.xz
Installing Python-3.7.4...

BUILD FAILED (Ubuntu 18.04 using python-build 1.2.16)

Inspect or clean up the working tree at /tmp/python-build.20200109175000.3042
Results logged to /tmp/python-build.20200109175000.3042.log

Last 10 log lines:
  File "/tmp/tmpge7ufapu/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/commands/__init__.py", line 6, in 
  File "/tmp/tmpge7ufapu/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/commands/completion.py", line 6, in 
  File "/tmp/tmpge7ufapu/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/cli/base_command.py", line 20, in 
  File "/tmp/tmpge7ufapu/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/download.py", line 37, in 
  File "/tmp/tmpge7ufapu/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/utils/glibc.py", line 3, in 
  File "/tmp/python-build.20200109175000.3042/Python-3.7.4/Lib/ctypes/__init__.py", line 7, in 
    from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'
Makefile:1132: recipe for target 'install' failed
make: *** [install] Error 1

droid@rc211v-usb:~$ sudo apt install libffi-dev