Read the Docs build information Build id: 3984346 Project: xanaduai-pennylane-lightning Version: 1374 Commit: 8d871d6dba3fdd253cb36cff81e07b2333b75f12 Date: 2026-05-04T18:48:17.207937Z State: finished Success: False [rtd-command-info] start-time: 2026-05-04T18:48:17.964458Z, end-time: 2026-05-04T18:48:18.877344Z, duration: 0, exit-code: 0 git clone --depth 1 https://github.com/PennyLaneAI/pennylane-lightning.git . Cloning into '.'... [rtd-command-info] start-time: 2026-05-04T18:48:18.966015Z, end-time: 2026-05-04T18:48:19.832076Z, duration: 0, exit-code: 0 git fetch origin --force --prune --prune-tags --depth 50 pull/1374/head:external-1374 From https://github.com/PennyLaneAI/pennylane-lightning * [new ref] refs/pull/1374/head -> external-1374 [rtd-command-info] start-time: 2026-05-04T18:48:20.563333Z, end-time: 2026-05-04T18:48:20.681205Z, duration: 0, exit-code: 0 git checkout --force 8d871d6dba3fdd253cb36cff81e07b2333b75f12 Note: switching to '8d871d6dba3fdd253cb36cff81e07b2333b75f12'. You are in 'detached HEAD' state. You can look around, make experimental changes and commit them, and you can discard any commits you make in this state without impacting any branches by switching back to a branch. If you want to create a new branch to retain commits you create, you may do so (now or later) by using -c with the switch command. Example: git switch -c Or undo this operation with: git switch - Turn off this advice by setting config variable advice.detachedHead to false HEAD is now at 8d871d6 Apply suggestion from @jzaia18 [rtd-command-info] start-time: 2026-05-04T18:48:20.771176Z, end-time: 2026-05-04T18:48:20.806616Z, duration: 0, exit-code: 0 cat .readthedocs.yml version: 2 sphinx: configuration: doc/conf.py python: install: - method: pip path: . build: os: ubuntu-24.04 tools: python: "3.12" apt_packages: - graphviz jobs: post_install: - pip install --group docs - PL_BACKEND="lightning_qubit" python scripts/configure_pyproject_toml.py && SKIP_COMPILATION=True python -m build - rm -rf ./build && PL_BACKEND="lightning_gpu" python scripts/configure_pyproject_toml.py && SKIP_COMPILATION=True python -m build - rm -rf ./build && PL_BACKEND="lightning_amdgpu" python scripts/configure_pyproject_toml.py && SKIP_COMPILATION=True python -m build - rm -rf ./build && PL_BACKEND="lightning_kokkos" python scripts/configure_pyproject_toml.py && SKIP_COMPILATION=True python -m build - rm -rf ./build && PL_BACKEND="lightning_tensor" python scripts/configure_pyproject_toml.py && SKIP_COMPILATION=True python -m build - python -m pip install ./dist/*.whl [rtd-command-info] start-time: 2026-05-04T18:48:21.659593Z, end-time: 2026-05-04T18:49:04.351620Z, duration: 42, exit-code: 0 apt-get update --assume-yes --quiet Ign:1 http://archive.ubuntu.com/ubuntu noble InRelease Ign:2 http://archive.ubuntu.com/ubuntu noble-updates InRelease Ign:3 http://archive.ubuntu.com/ubuntu noble-backports InRelease Ign:1 http://archive.ubuntu.com/ubuntu noble InRelease Ign:2 http://archive.ubuntu.com/ubuntu noble-updates InRelease Ign:3 http://archive.ubuntu.com/ubuntu noble-backports InRelease Get:4 http://security.ubuntu.com/ubuntu noble-security InRelease [126 kB] Get:5 http://security.ubuntu.com/ubuntu noble-security/main amd64 Packages [2018 kB] Get:6 http://security.ubuntu.com/ubuntu noble-security/main amd64 Components [25.7 kB] Get:7 http://security.ubuntu.com/ubuntu noble-security/universe amd64 Packages [1499 kB] Get:8 http://security.ubuntu.com/ubuntu noble-security/universe amd64 Components [95.1 kB] Get:9 http://security.ubuntu.com/ubuntu noble-security/restricted amd64 Packages [3566 kB] Get:10 http://security.ubuntu.com/ubuntu noble-security/restricted amd64 Components [157 B] Get:11 http://security.ubuntu.com/ubuntu noble-security/multiverse amd64 Packages [34.2 kB] Get:12 http://security.ubuntu.com/ubuntu noble-security/multiverse amd64 Components [158 B] Ign:1 http://archive.ubuntu.com/ubuntu noble InRelease Ign:2 http://archive.ubuntu.com/ubuntu noble-updates InRelease Ign:3 http://archive.ubuntu.com/ubuntu noble-backports InRelease Err:1 http://archive.ubuntu.com/ubuntu noble InRelease Could not connect to archive.ubuntu.com:80 (91.189.91.81), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.83), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.92.24), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.83), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.82), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.82), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.92.23), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.81), connection timed out Err:2 http://archive.ubuntu.com/ubuntu noble-updates InRelease Unable to connect to archive.ubuntu.com:http: Err:3 http://archive.ubuntu.com/ubuntu noble-backports InRelease Unable to connect to archive.ubuntu.com:http: Fetched 7364 kB in 39s (188 kB/s) Reading package lists... W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/noble/InRelease Could not connect to archive.ubuntu.com:80 (91.189.91.81), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.83), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.92.24), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.83), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.82), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.82), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.92.23), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.81), connection timed out W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/noble-updates/InRelease Unable to connect to archive.ubuntu.com:http: W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/noble-backports/InRelease Unable to connect to archive.ubuntu.com:http: W: Some index files failed to download. They have been ignored, or old ones used instead. [rtd-command-info] start-time: 2026-05-04T18:49:04.439757Z, end-time: 2026-05-04T18:49:44.637969Z, duration: 40, exit-code: 100 apt-get install --assume-yes --quiet -- graphviz Reading package lists... Building dependency tree... Reading state information... The following additional packages will be installed: fonts-liberation fonts-liberation-sans-narrow fonts-liberation2 libann0 Suggested packages: gsfonts graphviz-doc The following NEW packages will be installed: fonts-liberation fonts-liberation-sans-narrow fonts-liberation2 graphviz libann0 0 upgraded, 5 newly installed, 0 to remove and 226 not upgraded. Need to get 2471 kB of archives. After this operation, 7454 kB of additional disk space will be used. Ign:1 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation all 1:2.1.5-3 Ign:2 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation-sans-narrow all 1:1.07.6-4 Ign:3 http://archive.ubuntu.com/ubuntu noble/universe amd64 fonts-liberation2 all 1:2.1.5-3 Ign:4 http://archive.ubuntu.com/ubuntu noble/universe amd64 libann0 amd64 1.1.2+doc-9build1 Ign:5 http://archive.ubuntu.com/ubuntu noble/universe amd64 graphviz amd64 2.42.2-9build1 Ign:1 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation all 1:2.1.5-3 Ign:2 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation-sans-narrow all 1:1.07.6-4 Ign:3 http://archive.ubuntu.com/ubuntu noble/universe amd64 fonts-liberation2 all 1:2.1.5-3 Ign:4 http://archive.ubuntu.com/ubuntu noble/universe amd64 libann0 amd64 1.1.2+doc-9build1 Ign:5 http://archive.ubuntu.com/ubuntu noble/universe amd64 graphviz amd64 2.42.2-9build1 Ign:1 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation all 1:2.1.5-3 Ign:2 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation-sans-narrow all 1:1.07.6-4 Ign:3 http://archive.ubuntu.com/ubuntu noble/universe amd64 fonts-liberation2 all 1:2.1.5-3 Ign:4 http://archive.ubuntu.com/ubuntu noble/universe amd64 libann0 amd64 1.1.2+doc-9build1 Ign:5 http://archive.ubuntu.com/ubuntu noble/universe amd64 graphviz amd64 2.42.2-9build1 Err:1 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation all 1:2.1.5-3 Could not connect to archive.ubuntu.com:80 (91.189.92.24), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.83), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.83), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.81), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.81), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.82), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.82), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.92.23), connection timed out Err:2 http://archive.ubuntu.com/ubuntu noble/main amd64 fonts-liberation-sans-narrow all 1:1.07.6-4 Unable to connect to archive.ubuntu.com:http: Err:3 http://archive.ubuntu.com/ubuntu noble/universe amd64 fonts-liberation2 all 1:2.1.5-3 Unable to connect to archive.ubuntu.com:http: Err:4 http://archive.ubuntu.com/ubuntu noble/universe amd64 libann0 amd64 1.1.2+doc-9build1 Unable to connect to archive.ubuntu.com:http: Err:5 http://archive.ubuntu.com/ubuntu noble/universe amd64 graphviz amd64 2.42.2-9build1 Unable to connect to archive.ubuntu.com:http: E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/f/fonts-liberation/fonts-liberation_2.1.5-3_all.deb Could not connect to archive.ubuntu.com:80 (91.189.92.24), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.83), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.83), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.81), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.81), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.91.82), connection timed out Could not connect to archive.ubuntu.com:80 (185.125.190.82), connection timed out Could not connect to archive.ubuntu.com:80 (91.189.92.23), connection timed out E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/f/fonts-liberation-sans-narrow/fonts-liberation-sans-narrow_1.07.6-4_all.deb Unable to connect to archive.ubuntu.com:http: E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/f/fonts-liberation/fonts-liberation2_2.1.5-3_all.deb Unable to connect to archive.ubuntu.com:http: E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/a/ann/libann0_1.1.2%2bdoc-9build1_amd64.deb Unable to connect to archive.ubuntu.com:http: E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/g/graphviz/graphviz_2.42.2-9build1_amd64.deb Unable to connect to archive.ubuntu.com:http: E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?