Docker in Docker doesn't seem to respect dockerfile context variable

[FallingSnow]

I can't seem to change the build context for an image build caused by the pre-build configuration. I'm using docker in docker and /home/ayrton/capture is a valid path on the host (not on the container) but I can't seem to get past the error below.

I tried just manually setting the context path since my image build is not actually dependent on build context, but it seems no matter what variable I set (environmental or in Cross.toml) the context path doesn't change.

Below I tried changing the build context via the environmental variable (DOCKERFILE_CONTEXT=/home/ayrton) but you can see it still tries /home/ayrton/capture.

1 ❯ DOCKERFILE_CONTEXT=/home/ayrton cross build --target aarch64-unknown-linux-gnu -v
+ cargo metadata --format-version 1 --filter-platform aarch64-unknown-linux-gnu
[cross] warning: found unused key(s) in Cross configuration:
 > dockerfile
+ rustc --print sysroot
+ rustup toolchain list
+ rustup target list --toolchain stable-x86_64-unknown-linux-gnu
+ rustup component list --toolchain stable-x86_64-unknown-linux-gnu
+ /usr/sbin/docker
+ "/home/ayrton/capture/" /usr/sbin/docker build --label 'org.cross-rs.for-cross-target=aarch64-unknown-linux-gnu' --label 'org.cross-rs.workspace_root=/app' --tag cross-custom-app:aarch64-unknown-linux-gnu-0c35e-pre-build --build-arg 'CROSS_CMD=dpkg --add-architecture $CROSS_DEB_ARCH
apt-get update && apt-get install --assume-yes
apt-get update && apt-get install -y pkg-config libasound-dev:$CROSS_DEB_ARCH' --build-arg 'CROSS_DEB_ARCH=arm64' --file /app/target/aarch64-unknown-linux-gnu/Dockerfile.aarch64-unknown-linux-gnu-custom /home/ayrton/capture/
Error:
   0: could not run container
   1: when building custom image
   2: when pre-building
   3: could not execute `/usr/sbin/docker build --label 'org.cross-rs.for-cross-target=aarch64-unknown-linux-gnu' --label 'org.cross-rs.workspace_root=/app' --tag cross-custom-app:aarch64-unknown-linux-gnu-0c35e-pre-build --build-arg 'CROSS_CMD=dpkg --add-architecture $CROSS_DEB_ARCH
      apt-get update && apt-get install --assume-yes
      apt-get update && apt-get install -y pkg-config libasound-dev:$CROSS_DEB_ARCH' --build-arg 'CROSS_DEB_ARCH=arm64' --file /app/target/aarch64-unknown-linux-gnu/Dockerfile.aarch64-unknown-linux-gnu-custom /home/ayrton/capture/`
   4: No such file or directory (os error 2)

Note: CROSS_CMD=dpkg --add-architecture $CROSS_DEB_ARCH
apt-get update && apt-get install --assume-yes
apt-get update && apt-get install -y pkg-config libasound-dev:$CROSS_DEB_ARCH

[FallingSnow]

This issue seems to be resolved on the master branch. Install cross via cargo install cross --git https://github.com/cross-rs/cross instead.

Edit: Another thing to try is playing with the CROSS_DOCKER_IN_DOCKER and CROSS_CONTAINER_IN_CONTAINER environmental variables. For example I use CROSS_DOCKER_IN_DOCKER=1 CROSS_CONTAINER_IN_CONTAINER=0.