Mirage build step 9 fails

[cem2ran]

I'm not able to docker build anymore due to the following error:

Step 9/13 : RUN opam config exec -- mirage config -t esp32
 ---> Running in 7fa44f80fa4c
[WARNING] Running as root is not recommended
mirage: option `-t': invalid value `esp32', expected one of `unix', `macosx',
        `xen', `virtio', `ukvm', `muen' or `qubes'
Usage: mirage configure [OPTION]... 
Try `mirage configure --help' or `mirage --help' for more information.

[cem2ran]

I managed to resolve this by replacing mirage with mirage.3.0.8a+esp32 in step 5.

On another note I also tried out mirage.3.0.8b which results in out of memory.