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+---
+name: Unreproducible package
+about: A package that does not produce a bit-by-bit reproducible result each time it is built
+title: ''
+labels: '0.kind: enhancement', '6.topic: reproducible builds'
+assignees: ''
+
+---
+
+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.
+
+### Steps To Reproduce
+
+```
+nix-build '<nixpkgs>' -A ... --check --keep-failed
+```
+
+You can use `diffoscope` to analyze the differences in the output of the two builds.
+
+To view the build log of the build that produced the artifact in the binary cache:
+
+```
+nix-store --read-log $(nix-instantiate '<nixpkgs>' -A ...)
+```
+
+### Additional context
+
+(please share the relevant fragment of the diffoscope output here,
+and any additional analysis you may have done)