[verbatim]

There have been efforts trying to do the exact opposite of this, and enable reproducible builds.

Being able to compile code and get the same byte-for-byte result as someone else (i.e. a distribution shipping you binaries) can help eliminate concerns about binaries being tampered either accidentally or intentionally. This is a valuable security feature for some.

[ibotty]

If the seed is saved, you get reproducibly randomized builds.

[crest]

Use the (hash of the) source code to seed the CPRNG.