diff options
Diffstat (limited to 'nixpkgs/pkgs/build-support/setup-hooks/reproducible-builds.sh')
| -rw-r--r-- | nixpkgs/pkgs/build-support/setup-hooks/reproducible-builds.sh | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/build-support/setup-hooks/reproducible-builds.sh b/nixpkgs/pkgs/build-support/setup-hooks/reproducible-builds.sh new file mode 100644 index 000000000000..5e27ce8a25fe --- /dev/null +++ b/nixpkgs/pkgs/build-support/setup-hooks/reproducible-builds.sh @@ -0,0 +1,11 @@ +# Use the last part of the out path as hash input for the build. +# This should ensure that it is deterministic across rebuilds of the same +# derivation and not easily collide with other builds. +# We also truncate the hash so that it cannot cause reference cycles. +NIX_CFLAGS_COMPILE="${NIX_CFLAGS_COMPILE:-} -frandom-seed=$( + randSeed=${NIX_OUTPATH_USED_AS_RANDOM_SEED:-$out} + outbase="${randSeed##*/}" + randomseed="${outbase:0:10}" + echo $randomseed +)" +export NIX_CFLAGS_COMPILE |