Fix Docker build

Dockerfile

@@ -4,9 +4,9 @@ RUN apt update
 RUN apt install -y --no-install-recommends \
         gcc \
         ninja-build \
-        cmake=4.3.2-1~bpo13+1 \
         libc-dev \
         libwayland-dev \
         libxkbcommon-dev \
         xorg-dev \
         libglew-dev
+RUN apt install -y --no-install-recommends -t trixie-backports cmake

build_container.sh

@@ -4,7 +4,7 @@ cd "$(dirname "$0")"
 
 podman build . -t builder:latest
 
-podman run -v $PWD:$PWD builder:latest sh -c " \
+podman run -v $PWD:$PWD:z builder:latest sh -c " \
     cd $PWD
     cmake -S . -B build_docker -G Ninja -DCMAKE_BUILD_TYPE=Release -DDOCKER=true
     ninja -C build_docker