Leo Famulari <l...@famulari.name> skribis: > Can you take a look at python-2.7.10? > > Specifically, /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10 > > This is from "ifur" on #guix: > http://paste.lisp.org/display/311051
This is an “interesting” case. There’s indeed a hash mismatch between that narinfo and the nar (hydra.gnu.org and mirror.guixsd.org provide the exact same narinfo and nar though): --8<---------------cut here---------------start------------->8--- $ wget -q -O - https://hydra.gnu.org/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv.narinfo |grep Hash NarHash: sha256:1ifhxz7ng64ckrsfp0cy6rcybwrdf2mgq7p9w73ynbwy1w2frhp5 $ wget -q -O - https://hydra.gnu.org/nar/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10 | bunzip2 | guix hash /dev/stdin 1rb34mfv32zj6ir9nkrmw2mrc00n2gf9p2chihh1qpl9fmsxhhif $ guix hash -r /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10 1ifhxz7ng64ckrsfp0cy6rcybwrdf2mgq7p9w73ynbwy1w2frhp5 --8<---------------cut here---------------end--------------->8--- To spot the differences, I did: --8<---------------cut here---------------start------------->8--- $ wget -O - https://mirror.guixsd.org/nar/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10 | bunzip2 | guix archive -x /tmp/python $ diff -ur --no-dereference /tmp/python /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10 Binary files /tmp/python/lib/python2.7/_abcoll.pyc and /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10/lib/python2.7/_abcoll.pyc differ Binary files /tmp/python/lib/python2.7/abc.pyc and /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10/lib/python2.7/abc.pyc differ Binary files /tmp/python/lib/python2.7/codecs.pyc and /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10/lib/python2.7/codecs.pyc differ Binary files /tmp/python/lib/python2.7/copy_reg.pyc and /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10/lib/python2.7/copy_reg.pyc differ Binary files /tmp/python/lib/python2.7/encodings/aliases.pyc and /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10/lib/python2.7/encodings/aliases.pyc differ Binary files /tmp/python/lib/python2.7/encodings/__init__.pyc and /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10/lib/python2.7/encodings/__init__.pyc differ Binary files /tmp/python/lib/python2.7/encodings/utf_8.pyc and /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10/lib/python2.7/encodings/utf_8.pyc differ [...] $ diffoscope --html t.html /tmp/python/lib/python2.7 /gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10/lib/python2.7/ --8<---------------cut here---------------end--------------->8--- Diffoscope shows several hundred of bytes of differences in several .pyc files (so it’s not just 32-byte timestamps as discussed in <http://bugs.gnu.org/22010>, IIRC.) That the differences are so important is fishy. Could you check what you have on your machine? Is anyone able to make an independent build of this thing? For non-deterministic packages, something that could in theory happen (although it seems unlikely) is this: 1. nginx caches the narinfo of a first build with hash X; 2. nobody downloads the corresponding nar, and the result is eventually GC’d from hydra; 3. Hydra rebuilds the thing, obtains hash Y; the nar with hash Y is downloaded and cached by nginx, but, no luck, it doesn’t match the hash in the narinfo that was cached in step #1. That could happen, but it seems pretty far-fetched, especially for a package like Python. On my machine I looked for the corresponding “derivers”: --8<---------------cut here---------------start------------->8--- scheme@(guile-user)> ,use(guix) scheme@(guile-user)> (define s (open-connection)) scheme@(guile-user)> (valid-derivers s "/gnu/store/4bs4mx6xyx0jx9827vmmbxyhjln7cmcv-python-2.7.10") $4 = ("/gnu/store/a5s3mkl387wwkklj3ss5hw34ib9rb2p6-python-2.7.10.drv" "/gnu/store/pvsdsjn15rj1ciwr37vl2vqprvl57szg-python-2.7.10.drv") --8<---------------cut here---------------end--------------->8--- And then run: --8<---------------cut here---------------start------------->8--- $ guix build "/gnu/store/pvsdsjn15rj1ciwr37vl2vqprvl57szg-python-2.7.10.drv" --check --8<---------------cut here---------------end--------------->8--- However that’s not very helpful since it unsurprisingly fails with a “may not be deterministic” error. Ludo’.
