emscripten compilers don't seem to be detected anymore

Even if emsdk is set up to point to the emsdk root in the Devices view, no compilers are visible. Every time Qt Creator is started, it asks to set up emsdk path.

emsdk was recently cloned, these commands from the documentation were used to install 1.39.8 (with Qt 5.15):

./emsdk install 1.39.8
./emsdk activate --embedded 1.39.8

stracing Qt Creator at least shows that it is sourcing emsdk_env.sh