File is read-only; trying to patch anyway

[LaFreniere, Joseph]

I am working on the attached patch to package 
https://github.com/akermu/emacs-libvterm.git.

When building the package I get the following error:

> building 
> /gnu/store/89icdpwha5vvqmn2yn3949w503ck6cq6-emacs-vterm-0-1.de63115.tar.xz.drv...
> File vterm-module-make.el is read-only; trying to patch anyway
> patching file vterm-module-make.el
> File vterm.el is read-only; trying to patch anyway
> patching file vterm.el
> Hunk #1 FAILED at 45.
> 1 out of 1 hunk FAILED -- saving rejects to file vterm.el.rej

I have looked at several other packages and the call I'm making to 
`make-file-writable` _looks_ to be correct.  But that function is 
either not called before the patch is applied or else it is not 
having the intended effect.

--
Joseph LaFreniere

0001-gnu-Add-emacs-vterm.patch
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