sagemath-dev docker images performs full recompilation

[saraedum]

As reported on sage-devel, https://groups.google.com/g/sage-devel/c/CeOgqoAt4I8, docker run -it sagemath/sagemath-dev:develop performs a full recompilation of sage.

CC: @videlec

Component: docker

Issue created by migration from https://trac.sagemath.org/ticket/34241

[saraedum]

comment:1

The build scripts have probably changed in recent versions and now the sagemath-dev lacks some essential timestamped file.

[saraedum]

comment:2

Someone would have to go through the invocation of make with some debugging turned on to see why make thinks that everything needs to be rebuilt.