Как установить Python-Dev (для Python 2.7) на Ubuntu 18.04?

Ubuntu 18.04. У меня есть установка pip (2.7), которая не может найти "Python.h". Я попробовал это:

$ sudo apt install python-dev --fix-missing

и получил это для вывода:

Reading package lists... Done
Building dependency tree... 50%
Building dependency tree       
Reading state information... Done
The following package was automatically installed and is no longer required:
  python-all
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  libpython-dev libpython2.7 libpython2.7-dev python2.7-dev
The following NEW packages will be installed:
  libpython-dev libpython2.7 libpython2.7-dev python-dev python2.7-dev
0 upgraded, 5 newly installed, 0 to remove and 1 not upgraded.
Need to get 29.6 MB/29.6 MB of archives.
After this operation, 45.5 MB of additional disk space will be used.
Ign:1 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 libpython2.7 amd64 2.7.15-4ubuntu4~18.04.1
Ign:2 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 libpython2.7-dev amd64 2.7.15-4ubuntu4~18.04.1
Ign:3 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 python2.7-dev amd64 2.7.15-4ubuntu4~18.04.1
Err:1 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 libpython2.7 amd64 2.7.15-4ubuntu4~18.04.1
  404  Not Found [IP: 91.189.91.14 80]
Err:2 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 libpython2.7-dev amd64 2.7.15-4ubuntu4~18.04.1
  404  Not Found [IP: 91.189.91.14 80]
Err:3 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 python2.7-dev amd64 2.7.15-4ubuntu4~18.04.1
  404  Not Found [IP: 91.189.91.14 80]
Unable to correct missing packages.
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/p/python2.7/libpython2.7_2.7.15-4ubuntu4~18.04.1_amd64.deb  404  Not Found [IP: 91.189.91.14 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/p/python2.7/libpython2.7-dev_2.7.15-4ubuntu4~18.04.1_amd64.deb  404  Not Found [IP: 91.189.91.14 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/p/python2.7/python2.7-dev_2.7.15-4ubuntu4~18.04.1_amd64.deb  404  Not Found [IP: 91.189.91.14 80]
E: Aborting install.

Что мне нужно сделать, чтобы установить python-dev?