FATA[0000] unrecognized image format (open /tmp/buildkit-mount3221730565/Dockerfile: no such file or directory)

[junnplus]

Discussed in #1190

^{Originally posted by cmoulliard July 5, 2022}
I can build a project using docker but not at all when I execute the equivalent nerdctl build command within the same project

git clone https://github.com/halkyonio/my-backstage.git
cd my-backstage
yarn install; yarn build
cd packages/backend
docker build -f Dockerfile --tag backstage ../..
[+] Building 159.3s (13/13) FINISHED
 => [internal] load build definition from Dockerfile                                                                                                         0.0s
 => => transferring dockerfile: 1.48kB                                                                                                                       0.0s
 => [internal] load .dockerignore                                                                                                                            0.0s
 => => transferring context: 118B                                                                                                                            0.0s
 => [internal] load metadata for docker.io/library/node:16-bullseye-slim                                                                                     1.9s
 => [1/8] FROM docker.io/library/node:16-bullseye-slim@sha256:678b467339cdb3ddd10c8f7dfeb2e3cf18bd0a0ec25298fa59362d9703bd241e                               0.0s
 => [internal] load build context                                                                                                                            0.4s
 => => transferring context: 23.19MB                                                                                                                         0.4s
 => CACHED [2/8] WORKDIR /app                                                                                                                                0.0s
 => CACHED [3/8] RUN apt-get update &&     apt-get install -y --no-install-recommends libsqlite3-dev python3 build-essential &&     rm -rf /var/lib/apt/lis  0.0s
 => [4/8] COPY yarn.lock package.json packages/backend/dist/skeleton.tar.gz ./                                                                               0.1s
 => [5/8] RUN tar xzf skeleton.tar.gz && rm skeleton.tar.gz                                                                                                  0.6s
 => [6/8] RUN yarn install --frozen-lockfile --production --network-timeout 300000 && rm -rf "$(yarn cache dir)"                                           146.5s
 => [7/8] COPY packages/backend/dist/bundle.tar.gz app-config*.yaml ./                                                                                       0.1s
 => [8/8] RUN tar xzf bundle.tar.gz && rm bundle.tar.gz                                                                                                      0.9s
 => exporting to image                                                                                                                                       8.6s
 => => exporting layers                                                                                                                                      8.6s
 => => writing image sha256:c02410ea204b847d79046e792a89253979354cae9021598c8dc4f8e9c0715fc3                                                                 0.0s
 => => naming to docker.io/library/backstage                                                                                                                 0.0s                     

BUT using nerdctl that fails

nerdctl build -f Dockerfile -t backstage:dev ../..
[+] Building 0.2s (2/2) FINISHED
 => [internal] load build definition from Dockerfile                                                                                                         0.2s
 => => transferring dockerfile: 2B                                                                                                                           0.2s
 => CANCELED [internal] load .dockerignore                                                                                                                   0.2s
 => => transferring context: 116B                                                                                                                            0.2s
error: failed to solve: failed to read dockerfile: open /tmp/buildkit-mount3221730565/Dockerfile: no such file or directory
FATA[0000] unrecognized image format
```     </div>

[junnplus]

nerdctl build -f ./packages/backend/Dockerfile -t backstage:dev . is works,
but nerdctl build -f Dockerfile -t backstage:dev ../.. doesn't work

[cmoulliard]

Super. Many thanks. That works - YES :-)

nerdctl build -f packages/backend/Dockerfile -t backstage:dev .
[+] Building 217.5s (13/13) FINISHED
 => [internal] load build definition from Dockerfile                                                                                                         0.1s
 => => transferring dockerfile: 1.48kB                                                                                                                       0.0s
 => [internal] load .dockerignore                                                                                                                            0.2s
 => => transferring context: 118B                                                                                                                            0.1s
 => [internal] load metadata for docker.io/library/node:16-bullseye-slim                                                                                     1.6s
 => [1/8] FROM docker.io/library/node:16-bullseye-slim@sha256:678b467339cdb3ddd10c8f7dfeb2e3cf18bd0a0ec25298fa59362d9703bd241e                               0.0s
 => => resolve docker.io/library/node:16-bullseye-slim@sha256:678b467339cdb3ddd10c8f7dfeb2e3cf18bd0a0ec25298fa59362d9703bd241e                               0.0s
 => [internal] load build context                                                                                                                            1.5s
 => => transferring context: 23.19MB                                                                                                                         1.4s
 => CACHED [2/8] WORKDIR /app                                                                                                                                0.0s
 => CACHED [3/8] RUN apt-get update &&     apt-get install -y --no-install-recommends libsqlite3-dev python3 build-essential &&     rm -rf /var/lib/apt/lis  0.0s
 => [4/8] COPY yarn.lock package.json packages/backend/dist/skeleton.tar.gz ./                                                                               3.1s
 => [5/8] RUN tar xzf skeleton.tar.gz && rm skeleton.tar.gz                                                                                                  1.0s
 => [6/8] RUN yarn install --frozen-lockfile --production --network-timeout 300000 && rm -rf "$(yarn cache dir)"                                           153.0s
 => [7/8] COPY packages/backend/dist/bundle.tar.gz app-config*.yaml ./                                                                                       0.6s
 => [8/8] RUN tar xzf bundle.tar.gz && rm bundle.tar.gz                                                                                                      1.0s
 => exporting to oci image format                                                                                                                           55.5s
 => => exporting layers                                                                                                                                     42.0s
 => => exporting manifest sha256:30e5a14a189eeb7d41cc10865dce1e2a6786117e78f210a0dcf00a3224ad4e89                                                            0.0s
 => => exporting config sha256:8d3c48baa9df2670a69b44f4f936bdfad1f79294dfeeb6fb32b61185acea03e6                                                              0.0s
 => => sending tarball                                                                                                                                      13.4s
unpacking docker.io/library/backstage:dev (sha256:30e5a14a189eeb7d41cc10865dce1e2a6786117e78f210a0dcf00a3224ad4e89)...done

[junnplus]

@cmoulliard Thanks for the report, I will fix it.