```
contrib/guix-clean
contrib/guix-build
```
Check that the build produces the expected binaries.
Note that we still have the same symbol-check failure as before:
```
[8/8] Running symbol-check.py on bitcoin-qt...
FAILED: src/qt/CMakeFiles/symbol-check-bitcoin-qt /bitcoin/distsrc-f12aa73c14b3-x86_64-linux-gnu/src/qt/CMakeFiles/symbol-check-bitcoin-qt
cd /bitcoin/distsrc-f12aa73c14b3-x86_64-linux-gnu/src/qt && /home/pierre/.guix-profile/bin/python3.9 /bitcoin/contrib/devtools/symbol-check.py /bitcoin/distsrc-f12aa73c14b3-x86_64-linux-gnu/src/qt/bitcoin-qt
/bitcoin/distsrc-f12aa73c14b3-x86_64-linux-gnu/src/qt/bitcoin-qt: symbol pthread_sigmask from unsupported version GLIBC_2.32(15)
/bitcoin/distsrc-f12aa73c14b3-x86_64-linux-gnu/src/qt/bitcoin-qt: failed IMPORTED_SYMBOLS
```