moby/buildkit

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concurrent, cache-efficient, and Dockerfile-agnostic builder toolkit

Stars: 10.3k
Forks: 1.5k
Open beginner issues: 3
Indexed issues: 746
Avg merge: 1d 23h
Merged PRs (30d): 48

Dominant language: Go
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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746 open issues indexed

Local source directory metadata changes bypass checksum notification, causing stale COPY hits and later misses Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#7176 · Opened Sep 19, 2026
solver: ReleaseUnreferenced can hold the cache.db write lock for extended periods under sustained load Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

moby/buildkit#7175 · Opened Sep 19, 2026
`docker build` fails with "ref moby/1/<id> locked for <d>: unavailable" — overlay differ fallback reuses the ingest ref, and the overlay view mount is missing `index=off` Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#7166 · Opened Sep 18, 2026
Failure retrieving commit time with SOURCE_DATE_EPOCH set (`fork/exec /usr/bin/git: no such file or directory`) Open

status/triage

Difficulty 3/5 1-2 days Newbie friendliness 55/100

moby/buildkit#7151 · Opened Sep 15, 2026
Inline cache export drops a usable remote and exports records with no results Open

Difficulty 3/5 1-2 days Newbie friendliness 76/100

moby/buildkit#7146 · Opened Sep 14, 2026
Allow specifying buildkitd configuration as env variable Open

status/triage

Difficulty 3/5 1-2 days Newbie friendliness 55/100

moby/buildkit#7132 · Opened Sep 8, 2026
CopyIgnoredFile goes silent for all files when the .dockerignore contains any negated pattern Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

moby/buildkit#7125 · Opened Sep 6, 2026
BuildKit fails to start container process under Rosetta emulation Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 38/100

moby/buildkit#7110 · 1 comment · 1 reaction · Opened Sep 2, 2026
ADD with an outdated checksum succeeds using outdated content, where a build error should occur Open

Difficulty 4/5 3-5 days Newbie friendliness 72/100

moby/buildkit#7108 · 5 comments · Opened Sep 2, 2026
local cache exporter: reset=true can delete blobs from a concurrent export Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

moby/buildkit#7102 · 7 comments · Opened Aug 31, 2026
proposal: expose in-flight execs via /debug/execs on debugaddr Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 55/100

moby/buildkit#7096 · Opened Aug 28, 2026
--mount=type=cache unexpectedly empty in parallel builds Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#7088 · 2 comments · Opened Aug 27, 2026
Proxy-network runtime digests drop source locations and provenance associations Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 52/100

moby/buildkit#7084 · Opened Aug 26, 2026
In-process gateway forwarder drops NewContainer platform Open

status/triage

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

moby/buildkit#7081 · Opened Aug 26, 2026
docs: rootless.md should recommend a per-binary AppArmor profile over `apparmor_restrict_unprivileged_userns=0 Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

moby/buildkit#7073 · Opened Aug 26, 2026
/check creates core dump in in Lima VM with Rosetta Open

kind/bug

Difficulty 3/5 1-2 days Newbie friendliness 58/100

moby/buildkit#7052 · 2 comments · Opened Aug 19, 2026
Build context resolved as remote git checkout -> Git LFS pointer files in build context (refs docker/bake-action#488) Open

area/github-actions area/source kind/enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#7000 · 1 comment · Opened Jul 29, 2026
Auth token fetch is not retried on transient network errors (unlike blob/manifest fetches) Open

area/util kind/bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

moby/buildkit#6981 · Opened Jul 23, 2026
Remote base image used instead of local when `# syntax` is used Open

area/dockerfile area/frontend kind/bug status/triage

Difficulty 4/5 3-5 days Newbie friendliness 52/100

moby/buildkit#6956 · 2 comments · Opened Jul 14, 2026
buildctl du undercounts snapshots, causing GC to severely underestimate real disk usage Open

area/cache area/storage status/needs-more-info

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#6931 · 1 comment · Opened Jul 7, 2026
feature request: --build-context-follow-symlinks flag Open

area/cli kind/enhancement needs/maintainer-decision

Difficulty 4/5 3-5 days Newbie friendliness 47/100

moby/buildkit#6905 · 2 comments · Opened Jun 26, 2026
Support for extracting and seeding cache mounts. Open

area/cache kind/duplicate kind/enhancement status/triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

moby/buildkit#6900 · 4 comments · 3 reactions · Opened Jun 25, 2026
`mode=max` cache export silently drops build-stage layers with a lazy snapshotter + multi-stage `COPY --from` Open

area/cache area/remotecache area/solver area/worker kind/bug priority/high status/triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#6893 · 3 comments · Opened Jun 23, 2026
Switch to more performant compression implementations Open

area/exporter area/reproducible-builds exp/expert kind/bench-candidate kind/enhancement status/needs-investigation

Difficulty 5/5 Over a week Newbie friendliness 35/100

moby/buildkit#6841 · 5 comments · Opened Jun 8, 2026
additional_contexts fan-in hits 4 MB gRPC limit at small N — duplicating tree serialization Open

area/llb area/solver

Difficulty 5/5 Over a week Newbie friendliness 48/100

moby/buildkit#6726 · Opened Apr 26, 2026
ADD with Azure DevOps HTTPS git URL silently downloads HTML instead of cloning — .git suffix requirement undocumented and incompatible with Azure DevOps Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#6688 · 10 comments · Opened Apr 12, 2026
Local exporter creates incorrect symlinks with multi-platform Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

moby/buildkit#6684 · 4 comments · Opened Apr 10, 2026
BuildKit + CycloneDX SBOM Integration Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 52/100

moby/buildkit#6665 · 1 comment · 6 reactions · Opened Apr 7, 2026
atime is touched in containerd snapshotter Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#6648 · 1 comment · Opened Apr 2, 2026
Cache manifests should be fetched in the background Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 38/100

moby/buildkit#6593 · 2 comments · 1 reaction · Opened Mar 19, 2026
Windows: os.MkdirTemp resolves to inaccessible C:\Windows\SystemTemp when running as SYSTEM on Go 1.21+ Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

moby/buildkit#6591 · 1 comment · Opened Mar 18, 2026
Windows: bindfilter.ApplyFileBinding fails with 'Access is denied' inside HostProcess containers Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

moby/buildkit#6590 · Opened Mar 18, 2026
COPY --from corrupts large ELF binary (~65MB) in multi-stage builds on arm64 Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

moby/buildkit#6545 · 6 comments · Opened Mar 1, 2026
BuildKit produces image with duplicated empty layer causing overlayfs failure on containerd (GKE) Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

moby/buildkit#6543 · 1 comment · Opened Feb 27, 2026
provenance: define canonical PURL encoding for digest qualifier in materials/subjects Open

area/attestations needs/maintainer-decision status/needs-attention

Difficulty 5/5 Over a week Newbie friendliness 35/100

moby/buildkit#6525 · Opened Feb 17, 2026
Incorrect TARGETPLATFORM and platform in registry when build --platform is specified by FROM statement in the Dockerfile Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#6518 · 7 comments · 2 reactions · Opened Feb 12, 2026
There is no --quiet option that doesn't also hide build errors Open

area/buildctl kind/enhancement priority/low

Difficulty 4/5 3-5 days Newbie friendliness 38/100

moby/buildkit#6513 · 4 comments · Opened Feb 9, 2026
enhancement: add build check for uses of `DEBIAN_FRONTEND` in Dockerfiles Open

area/dockerfile area/dockerfile/checks status/triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

moby/buildkit#6510 · 1 comment · Opened Feb 4, 2026
Support multiple input dockerfiles (single frontend) Open

area/frontend kind/enhancement priority/low

moby/buildkit#6508 · 4 comments · 1 assignee · Opened Feb 2, 2026
BuildKit drops inherited CMD when child image sets only ENTRYPOINT Open

area/dockerfile area/docs

moby/buildkit#6506 · 2 comments · 1 reaction · 1 assignee · Opened Feb 2, 2026
Buildkit fails on AKSUbuntu-2204gen2containerd-202601.13.0 node pool version (`can't open cgroup: openat2 /sys/fs/cgroup/kubepods.slice/kubepods-besteffort.slice [...]: no such or directory: unknown`) Open

kind/external status/triage

Difficulty 4/5 3-5 days Newbie friendliness 38/100

moby/buildkit#6505 · 9 comments · Opened Feb 2, 2026
Cache image layers extraction is very slow without any apparent reason, even on high end hardware Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

moby/buildkit#6499 · 4 comments · 5 reactions · Opened Jan 28, 2026
When using `--mount=type=secret,env=...` it should be possible to select the environment variable behaviour if the secret is not present Open

status/triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

moby/buildkit#6498 · Opened Jan 28, 2026
Vulnerability in buildkit project (sigstore package related to its legacy TUF client) Open

status/triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

moby/buildkit#6488 · 2 comments · Opened Jan 23, 2026
.dockerignore vs inaccessible folders Open

status/needs-investigation

moby/buildkit#6454 · 1 comment · 1 assignee · Opened Jan 13, 2026
QEMU emulated OpenTofu sporadically crashes but only if a builder is used Open

area/qemu kind/bug

Difficulty 5/5 Over a week Newbie friendliness 30/100

moby/buildkit#6445 · Opened Jan 6, 2026
Expose sufficient git metadata to Dockerfile to be able to do a full git describe Open

status/triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

moby/buildkit#6441 · 2 comments · Opened Dec 30, 2025
Running Buildkitd.exe standalone under Windows Open

status/triage

Difficulty 5/5 Over a week Newbie friendliness 25/100

moby/buildkit#6440 · 2 comments · Opened Dec 22, 2025
Standalone buildctl compilation option Open

status/triage

Difficulty 5/5 Over a week Newbie friendliness 25/100

moby/buildkit#6438 · 2 reactions · Opened Dec 22, 2025
Add native support for -o type=iso Open

status/triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

moby/buildkit#6437 · Opened Dec 22, 2025

moby/buildkit

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