sbcl @2.1.4_0+fancy does not compile on OS X 10.15.7

[polydevuk]

This port does not build. The error ends with:

:info:build 15: (LOAD "make-host-1.lisp" :VERBOSE NIL :PRINT NIL :IF-DOES-NOT-EXIST T :EXTERNAL-FORMAT :DEFAULT)
:info:build 16: (COMMON-LISP-USER::LOAD-SBCL-FILE "make-host-1.lisp" T)
:info:build 17: (HOST-SB-INT:SIMPLE-EVAL-IN-LEXENV (COMMON-LISP-USER::LOAD-SBCL-FILE "make-host-1.lisp") #<NULL-LEXENV>)
:info:build 18: (EVAL (COMMON-LISP-USER::LOAD-SBCL-FILE "make-host-1.lisp"))
:info:build 19: (HOST-SB-EXT:INTERACTIVE-EVAL (COMMON-LISP-USER::LOAD-SBCL-FILE "make-host-1.lisp") :EVAL NIL)
:info:build 20: (HOST-SB-IMPL::REPL-FUN NIL)
:info:build 21: ((LAMBDA NIL :IN HOST-SB-IMPL::TOPLEVEL-REPL))
:info:build 22: (HOST-SB-IMPL::%WITH-REBOUND-IO-SYNTAX #<CLOSURE (LAMBDA NIL :IN HOST-SB-IMPL::TOPLEVEL-REPL) {1002DE4FCB}>)
:info:build 23: (HOST-SB-IMPL::TOPLEVEL-REPL NIL)
:info:build 24: (HOST-SB-IMPL::TOPLEVEL-INIT)
:info:build 25: ((FLET #:WITHOUT-INTERRUPTS-BODY-85 :IN HOST-SB-EXT:SAVE-LISP-AND-DIE))
:info:build 26: ((LABELS HOST-SB-IMPL::RESTART-LISP :IN HOST-SB-EXT:SAVE-LISP-AND-DIE))
:info:build unhandled condition in --disable-debugger mode, quitting
:info:build Command failed: SBCL_MACOSX_VERSION_MIN=10.15 CC=/usr/bin/clang CXX=/usr/bin/clang++ CPP=/usr/bin/cpp sh ./make.sh --fancy --prefix=/opt/local --xc-host="/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_sbcl/sbcl/work/sbcl-1.2.11-x86-64-darwin/src/runtime/sbcl --core /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_sbcl/sbcl/work/sbcl-1.2.11-x86-64-darwin/output/sbcl.core --disable-debugger --sysinit /dev/null --userinit /dev/null"
:info:build Exit code: 1
:error:build Failed to build sbcl: command execution failed
:debug:build Error code: NONE
:debug:build Backtrace: command execution failed
:debug:build     while executing
:debug:build "$procedure $targetname"