Emacs installed by heroku-buildpack-apt does not work

[raxod502]

When I put emacs-nox in my Aptfile, an emacs25 binary is installed but when I try to run it I get:

Warning: arch-dependent data dir '/usr/lib/emacs/25.2/x86_64-linux-gnu/': No such file or directory
Warning: arch-independent data dir '/usr/share/emacs/25.2/etc/': No such file or directory
Warning: Lisp directory '/usr/share/emacs/25.2/lisp': No such file or directory
Error: charsets directory not found:
/usr/share/emacs/25.2/etc/charsets
Emacs will not function correctly without the character map files.
Please check your installation!

Presumably this is because Emacs is not a relocatable package, hence the installation process used by heroku-buildpack-apt is not suitable for it.

How can I work around this problem?

[raxod502]

To install Emacs on Heroku, one may use:

• https://github.com/raxod502/heroku-buildpack-emacs.