[vishvananda]

Unfortunately, nix does not produce fully reproducible builds. The build environment is portable and produced in a way that it can be repeated, but due to the limitations of the software that is being built, the builds are not binary reproducible. You can see some commentary on the nix team hoping to adopt some of the work being done by debian et al here: https://github.com/NixOS/nixpkgs/issues/9731

[manveru]

There is also https://r13y.com/

[mbakke]

Nice!

In case any Nixers are reading this, here is how I got NSPR to build reproducibly in Guix:

https://git.savannah.gnu.org/cgit/guix.git/commit/?id=6d7786...

[scarmig]

Interesting, thanks for sharing!