Reduce the level of parallelism when building SciPy-bundle (for RISC-V)

[julianmorillo]

We had problems with the number of opened files in EESSI/dev.eessi.io-riscv#25

[bedroge]

Let's see if the bot is configured to listen to this repo:

bot: build repo:dev.eessi.io-riscv-2025.06-001 instance:eessi-bot-riscv for:arch=riscv64/generic

[riscv-eessi-io-bot]

New job on instance eessi-bot-riscv for repository dev.eessi.io-riscv-2025.06-001
Building on: generic
Building for: riscv64/generic
Job dir: /home/eessibot/shared/jobs/2026.02/pr_156/263311

date	job status	comment
Feb 02 16:10:21 UTC 2026	submitted	job id 263311 awaits release by job manager
Feb 02 16:10:56 UTC 2026	released	job awaits launch by Slurm scheduler
Feb 02 16:12:01 UTC 2026	running	job 263311 is running
Feb 02 16:13:13 UTC 2026	finished	😁 SUCCESS (click triangle for details) Details ✅ job output file slurm-263311.out ✅ no message matching FATAL: ✅ no message matching ERROR: ✅ no message matching FAILED: ✅ no message matching required modules missing: ✅ found message(s) matching No missing installations ✅ found message matching .tar.* created! Artefacts eessi-2025.06-software-linux-riscv64-generic-layer-1770048715.tar.zst size: 0 MiB (22 bytes) entries: 0 modules under 2025.06-001/software/linux/riscv64/generic/modules/all no module files in tarball software under 2025.06-001/software/linux/riscv64/generic/software no software packages in tarball reprod directories under 2025.06-001/software/linux/riscv64/generic/reprod no reprod directories in tarball other under 2025.06-001/software/linux/riscv64/generic no other files in tarball
Feb 02 16:13:13 UTC 2026	test result	🤷 UNKNOWN (click triangle for detailed information) Job test file _bot_job263311.test does not exist in job directory, or parsing it failed.

[bedroge]

bot: build repo:dev.eessi.io-riscv-2025.06-001 instance:eessi-bot-riscv for:arch=riscv64/generic

[riscv-eessi-io-bot]

New job on instance eessi-bot-riscv for repository dev.eessi.io-riscv-2025.06-001
Building on: generic
Building for: riscv64/generic
Job dir: /home/eessibot/shared/jobs/2026.02/pr_156/263314

date	job status	comment
Feb 02 16:26:53 UTC 2026	submitted	job id 263314 awaits release by job manager
Feb 02 16:27:07 UTC 2026	released	job awaits launch by Slurm scheduler
Feb 02 16:28:15 UTC 2026	running	job 263314 is running
Feb 02 22:11:45 UTC 2026	finished	😢 FAILURE (click triangle for details) Details ✅ job output file slurm-263314.out ✅ no message matching FATAL: ❌ found message matching ERROR: ❌ found message matching FAILED: ❌ found message matching required modules missing: ❌ no message matching No missing installations ✅ found message matching .tar.* created! Artefacts eessi-2025.06-software-linux-riscv64-generic-layer-1770070080.tar.zst size: 0 MiB (67990 bytes) entries: 15 modules under 2025.06-001/software/linux/riscv64/generic/modules/all gfbf/2025a.lua software under 2025.06-001/software/linux/riscv64/generic/software gfbf/2025a reprod directories under 2025.06-001/software/linux/riscv64/generic/reprod no reprod directories in tarball other under 2025.06-001/software/linux/riscv64/generic no other files in tarball
Feb 02 22:11:45 UTC 2026	test result	🤷 UNKNOWN (click triangle for detailed information) Job test file _bot_job263314.test does not exist in job directory, or parsing it failed.