Intermittent build failure in armv7 mozjs (/mozjs/js/src/wasm/WasmTypes.h:25:10: fatal error: 'mozilla/BinarySearch.h' file not found)

[jdm]

In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/builtin/RegExp.cpp:7:
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/builtin/RegExp.h:10:
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/vm/RegExpObject.h:20:
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/vm/JSContext.h:26:
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/vm/Runtime.h:53:
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/vm/Stack.h:31:
In file included from /Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/wasm/WasmFrameIter.h:24:
/Users/worker/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/wasm/WasmTypes.h:25:10: fatal error: 'mozilla/BinarySearch.h' file not found
#include "mozilla/BinarySearch.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.
make[4]: *** [RegExp.o] Error 1