Call to `non_stage_variables.py` requires yaml, but is not provided in build environment

[hzeller]

Subject

[Build] for compilation-related issues.

Describe the bug

when attempting to run bazel test -c opt test/... -k in openroad, it seems that there is an assumption that a yaml Python module exists.

Here a little snippet from the bazel output:

ERROR: /home/hzeller/src/my/OpenROAD/test/orfs/gcd/BUILD:8:11: Action test/orfs/gcd/results/asap7/gcd/b/1_1_yosys_canonicalize.rtlil failed: (Exit 2): bash failed: error executing Action command (from target //test/orfs/gcd:gcd_b_synth) /nix/store/vn99qq1csfd4brf2ichflphvkzsv2gp7-bash/bin/bash -c ... (remaining 6 arguments skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
make: *** [external/bazel-orfs++orfs_repositories+docker_orfs/OpenROAD-flow-scripts/flow/Makefile:273: do-yosys-canonicalize] Error 1
mkdir -p bazel-out/k8-opt/bin/test/orfs/gcd/results/asap7/gcd/b/
echo 310.001 > bazel-out/k8-opt/bin/test/orfs/gcd/results/asap7/gcd/b/clock_period.txt
external/bazel-orfs++orfs_repositories+docker_orfs/OpenROAD-flow-scripts/flow/scripts/synth.sh external/bazel-orfs++orfs_repositories+docker_orfs/OpenROAD-flow-scripts/flow/scripts/synth_canonicalize.tcl bazel-out/k8-opt/bin/test/orfs/gcd/logs/asap7/gcd/b/1_1_yosys_canonicalize.log
ERROR: TCL interpreter returned an error: Traceback (most recent call last):
  File "/home/hzeller/.cache/bazel/_bazel_hzeller/515c003e8af37d4c8564c2613da4cc17/sandbox/linux-sandbox/23545/execroot/_main/external/bazel-orfs++orfs_repositories+docker_orfs/OpenROAD-flow-scripts/flow/scripts/non_stage_variables.py", line 10, in <module>
    import yaml
ModuleNotFoundError: No module named 'yaml'
ERROR: /home/hzeller/src/my/OpenROAD/test/orfs/gcd/BUILD:8:11: Action test/orfs/gcd/results/asap7/gcd/base/1_1_yosys_canonicalize.rtlil failed: (Exit 2): bash failed: error executing Action command (from target //test/orfs/gcd:gcd_synth) /nix/store/vn99qq1csfd4brf2ichflphvkzsv2gp7-bash/bin/bash -c ... (remaining 6 arguments skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
make: *** [external/bazel-orfs++orfs_repositories+docker_orfs/OpenROAD-flow-scripts/flow/Makefile:273: do-yosys-canonicalize] Error 1
mkdir -p bazel-out/k8-opt/bin/test/orfs/gcd/results/asap7/gcd/base/
echo 310.001 > bazel-out/k8-opt/bin/test/orfs/gcd/results/asap7/gcd/base/clock_period.txt
external/bazel-orfs++orfs_repositories+docker_orfs/OpenROAD-flow-scripts/flow/scripts/synth.sh external/bazel-orfs++orfs_repositories+docker_orfs/OpenROAD-flow-scripts/flow/scripts/synth_canonicalize.tcl bazel-out/k8-opt/bin/test/orfs/gcd/logs/asap7/gcd/base/1_1_yosys_canonicalize.log
ERROR: TCL interpreter returned an error: Traceback (most recent call last):
  File "/home/hzeller/.cache/bazel/_bazel_hzeller/515c003e8af37d4c8564c2613da4cc17/sandbox/linux-sandbox/23544/execroot/_main/external/bazel-orfs++orfs_repositories+docker_orfs/OpenROAD-flow-scripts/flow/scripts/non_stage_variables.py", line 10, in <module>
    import yaml
ModuleNotFoundError: No module named 'yaml'
ERROR: /home/hzeller/src/my/OpenROAD/test/orfs/ram_8x7/BUILD:10:10: Action test/orfs/ram_8x7/results/asap7/ram_8x7/base/1_1_yosys_canonicalize.rtlil failed: (Exit 2): bash failed: error executing Action command (from target //test/orfs/ram_8x7:ram_8x7_synth) /nix/store/vn99qq1csfd4brf2ichflphvkzsv2gp7-bash/bin/bash -c ... (remaining 6 arguments skipped)

Expected Behavior

It compiles :)
Don't know what is needed.

Environment

kernel: Linux 6.19.9
os: NixOS 26.05 (Yarara)


Compiled with bazel 8.6.0

To Reproduce

bazel test -c opt test/...

Relevant log output

see above.

Screenshots

No response

Additional Context

No response

[oksaumya]

@hzeller can i work on this issue?