Intermittent build failure in mozjs (fatal error: 'mozilla/Likely.h' file not found)

[CYBAI]

--- stderr
Reticulating splines...
Finished reading 51 moz.build files in 3.94s
Read 0 gyp files in parallel contributing 0.00s to total wall time
Processed into 205 build config descriptors in 0.72s
RecursiveMake backend executed in 2.17s
  141 total backend files; 141 created; 0 updated; 0 unchanged; 0 deleted; 6 -> 32 Makefile
Total wall time: 7.01s; CPU time: 0.85s; Efficiency: 12%; Untracked: 0.19s
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/9a6d8fc/mozjs/js/src/gc/StoreBuffer.cpp:7:
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/9a6d8fc/mozjs/js/src/gc/StoreBuffer-inl.h:10:
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/9a6d8fc/mozjs/js/src/gc/StoreBuffer.h:11:
In file included from /Users/worker/tasks/task_1588755752/repo/target/debug/build/mozjs_sys-4f13869e3bfffe79/out/build/dist/include/mozilla/HashFunctions.h:50:
/Users/worker/tasks/task_1588755752/repo/target/debug/build/mozjs_sys-4f13869e3bfffe79/out/build/dist/include/mozilla/Assertions.h:18:10: fatal error: 'mozilla/Likely.h' file not found
#include "mozilla/Likely.h"
         ^~~~~~~~~~~~~~~~~~
1 error generated.
make[4]: *** [StoreBuffer.o] Error 1
make[3]: *** [js/src/gc/target-objects] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [compile] Error 2
make[1]: *** [default] Error 2
make: *** [all] Error 2
thread 'main' panicked at 'assertion failed: result.success()', /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/9a6d8fc/build.rs:177:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace