problem building firefox

Hello:
	On a system running:

14.0-CURRENT FreeBSD 14.0-CURRENT #0 main-d6327ae8c1: Sun Jan 24 14:16:54 EST 2021 amd64 

	with ports updated daily and wasi-compiler-rt13 installed,
building firefox fails with:

===>   firefox-102.0.1,2 depends on package: nspr>=4.32 - found
===>   firefox-102.0.1,2 depends on package: nss>=3.79 - found
===>   firefox-102.0.1,2 depends on package: icu>=71.1 - found
===>   firefox-102.0.1,2 depends on package: libevent>=2.1.8 - found
===>   firefox-102.0.1,2 depends on package: harfbuzz>=4.1.0 - found
===>   firefox-102.0.1,2 depends on package: graphite2>=1.3.14 - found
===>   firefox-102.0.1,2 depends on package: png>=1.6.37 - found
===>   firefox-102.0.1,2 depends on package: dav1d>=1.0.0 - found
===>   firefox-102.0.1,2 depends on package: libvpx>=1.11.0 - found
===>   firefox-102.0.1,2 depends on package: py39-sqlite3>0 - found
===>   firefox-102.0.1,2 depends on package: v4l_compat>0 - found
===>   firefox-102.0.1,2 depends on executable: autoconf2.13 - found
===>   firefox-102.0.1,2 depends on executable: nasm - found
===>   firefox-102.0.1,2 depends on executable: yasm - found
===>   firefox-102.0.1,2 depends on executable: zip - found
===>   firefox-102.0.1,2 depends on file: /usr/local/share/wasi-sysroot/lib/wasm32-wasi/libc++abi.a - found
===>   firefox-102.0.1,2 depends on file: /usr/local/share/wasi-sysroot/lib/wasm32-wasi/libc.a - found
===>   firefox-102.0.1,2 depends on file: /usr/local/llvm13/lib/clang//lib/wasi/libclang_rt.builtins-wasm32.a - not found
===>  Installing for wasi-compiler-rt13-13.0.1
===>  Checking if wasi-compiler-rt13 is already installed
===>   wasi-compiler-rt13-13.0.1 is already installed
      You may wish to ``make deinstall'' and install this port again
      by ``make reinstall'' to upgrade it properly.
      If you really wish to overwrite the old port of wasi-compiler-rt13
      without deleting it first, set the variable "FORCE_PKG_REGISTER"
      in your environment or the "make install" command line.
*** Error code 1

	What's wrong?  Does it perhaps involve the extra '/' in the path?
	Help. please!  :-)


			Respectfully,


				Robert Huff