Philippe Vaucher

> From Debian packages: `apt install docker.io` Ah right, yeah that's not recommended AFAIK. Can you try installing docker the recommended way? https://docs.docker.com/desktop/linux/install/debian I'm not too keen on spending time...

From what I understand it's from commits like these https://github.com/purcell/nix-emacs-ci/commit/e44330eff29846ba56eb2d63fc84ed8812f9df11 @purcell you confirm? Wouldn't it make sense to have it updated more often?

@purcell consider setting the commit SHA1 somewhere so I can reuse it for by my git checkout :wink:

> Hi @Silex, I've noticed what that the source tarball for the master-dev image is taken to be the [latest source tarball](https://github.com/Silex/docker-emacs/blob/068c9e6da4bda14adda02c1193076406c809776e/master/debian/dev/Dockerfile#L46), which is unlikely to be the same commit...

@DamienCassou in case that interests you :wink:

Hello, I went for the tarball because that's much easier on the servers (compared to a full git clone each time a new image is built), and the source is...

> it seems you redid everything as part of a broader mission (moving to Nix?). Yes, by moving to purcell's nix package I got rid of plenty of old bugs...

@jpneverwas: ok so you are more interested in the `*.o` stuff, I have an idea that might just work, assuming nix doesn't "make clean" as part of the process, is...

@jpneverwas: your task is to find out how to have `nix-env -iA emacs-26-3 -f https://github.com/silex/nix-emacs-ci/archive/master.tar.gz` keep the .o, my guess is that it uses a temporary directory that it deletes...

Idea: apply a patch that modifies the makefile to copy the build dir to some other place at the very end of "make install".