The levels a build module judges hand the tests MESH_BUILD_NODE=1; the tests that run a step in bubblewrap fail on it when bwrap is missing. Issue 1309
Each run step goes through mesh-sdk's buildstep.Isolated: no network, none of the account,
the workspace read-write, the toolchain read-only, the npm cache beneath a throwaway layer
unless the build step is told publish (a trunk build). The module declares the bubblewrap
package and refuses a step, unhealthy, while bwrap is missing or older than 0.10. The proof
test runs a probe script through the real test step.
jschoubben