build extend module with nginx docker is error

Bug Overview

When I use a third-party module and there is no deb package, building an image will report an error. Here is the replication operation

mkdir -p ngx_waf

wget -O Dockerfile https://raw.githubusercontent.com/nginx/docker-nginx/refs/heads/master/modules/Dockerfile
 echo 'https://github.com/ADD-SP/ngx_waf/archive/refs/tags/v6.1.10.tar.gz' > ngx_waf/source
 
echo 'flex bison' > ngx_waf/build-deps
 
echo '' > ngx_waf/prebuild && chmod +x ngx_waf/prebuild 
 
 tree ngx_waf
 
docker build --build-arg ENABLED_MODULES="ngx_waf" -t third-nginx .

Here is the error log:

1.631 Fetched 9307 kB in 1s (6677 kB/s)
1.631 Reading package lists...
2.349 Reading package lists...
3.077 E: Unsupported file /tmp/packages/nginx-module-ngxwaf_1.27.5*.deb given on commandline
------
Dockerfile:73
--------------------
  72 |     FROM ${NGINX_FROM_IMAGE}
  73 | >>> RUN --mount=type=bind,target=/tmp/packages/,source=/tmp/packages/,from=builder \
  74 | >>>     apt-get update \
  75 | >>>     && . /tmp/packages/modules.env \
  76 | >>>     && for module in $BUILT_MODULES; do \
  77 | >>>            apt-get install --no-install-suggests --no-install-recommends -y /tmp/packages/nginx-module-${module}_${NGINX_VERSION}*.deb; \
  78 | >>>        done \
  79 | >>>     && rm -rf /var/lib/apt/lists/
  80 |     
--------------------
ERROR: failed to solve: process "/bin/sh -c apt-get update     && . /tmp/packages/modules.env     && for module in $BUILT_MODULES; do            apt-get install --no-install-suggests --no-install-recommends -y /tmp/packages/nginx-module-${module}_${NGINX_VERSION}*.deb;        done     && rm -rf /var/lib/apt/lists/" did not complete successfully: exit code: 100

Expected Behavior

1

Steps to Reproduce the Bug

1

Environment Details

docker

Additional Context

No response

Start with modules/Dockerfile, especially the package installation loop at lines 73-79, then run the reproduction using ngx_waf/source and ngx_waf/build-deps. Compare the generated files under /tmp/packages with the requested module name and verify that building an image with a third-party module without a Debian package completes successfully.