Building this package twice does not produce the bit-by-bit identical result each time, making it harder to detect CI breaches. You can read more about this at https://reproducible-builds.org/ .
Fixing bit-by-bit reproducibility also has additional advantages, such as avoiding hard-to-reproduce bugs, making content-addressed storage more effective and reducing rebuilds in such systems.
If this command completes successfully, no differences where found. However, when it ends in `error: derivation '<X>' may not be deterministic: output '<Y>' differs from '<Z>'`, you can use `diffoscope <Y> <Z>` to analyze the differences in the output of the two builds.
