Fail to build `make -C run_rustc all` on macOS 10.14

[catap]

Local root 42b54861f26253a2ab2c71bcfbe74ee2418db293 which is failed as:

(0/1) BUILDING proc_macro v0.0.0 with features [mrustc,curl-sys/force-system-lib-on-osx]
> /opt/local/libexec/mrustc/bin/mrustc lib/libproc_macro/src/lib.rs -o output-1.54.0/libproc_macro.rlib --crate-name proc_macro --crate-type rlib -C emit-depfile=output-1.54.0/libproc_macro.rlib.d --crate-tag 0_0_0_H1 --cfg debug_assertions -O -L output-1.54.0 --cfg feature="mrustc" --cfg feature="curl-sys/force-system-lib-on-osx"
BUILDING dump from proc_macro v0.0.0 with features [mrustc,curl-sys/force-system-lib-on-osx]
> /opt/local/libexec/mrustc/bin/mrustc lib/libproc_macro/tools/dump.rs -o output-1.54.0/dump --crate-name dump --crate-type bin -C emit-depfile=output-1.54.0/dump.d --crate-tag 0_0_0_H1 --cfg debug_assertions -O -L output-1.54.0 --cfg feature="mrustc" --cfg feature="curl-sys/force-system-lib-on-osx" --extern proc_macro=output-1.54.0/libproc_macro.rlib
mkdir -p output-1.54.0/rustc-build
CFG_COMPILER_HOST_TRIPLE=x86_64-apple-darwin LLVM_CONFIG=/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_mrustc/mrustc-rust/work/mrustc-42b54861f26253a2ab2c71bcfbe74ee2418db293/rustc-1.54.0-src/build/bin/llvm-config CFG_RELEASE=1.54.0	 CFG_RELEASE_CHANNEL=stable CFG_VERSION=1.54.0-stable-mrustc CFG_PREFIX=mrustc CFG_LIBDIR_RELATIVE=lib LD_LIBRARY_PATH=/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_mrustc/mrustc-rust/work/mrustc-42b54861f26253a2ab2c71bcfbe74ee2418db293/output-1.54.0 REAL_LIBRARY_PATH_VAR=LD_LIBRARY_PATH RUSTC_INSTALL_BINDIR=bin MRUSTC_LIBDIR=/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_mrustc/mrustc-rust/work/mrustc-42b54861f26253a2ab2c71bcfbe74ee2418db293/output-1.54.0 /opt/local/libexec/mrustc/bin/minicargo rustc-1.54.0-src/compiler/rustc --vendor-dir rustc-1.54.0-src/vendor --output-dir output-1.54.0/rustc-build -L output-1.54.0/ --features curl-sys/force-system-lib-on-osx --manifest-overrides rustc-1.54.0-overrides.toml --features llvm
> /opt/local/libexec/mrustc/bin/mrustc -Z print-cfgs
While processing rustc-1.54.0-src/vendor/tracing-subscriber/Cargo.toml
While processing rustc-1.54.0-src/compiler/rustc_driver/Cargo.toml
While processing rustc-1.54.0-src/compiler/rustc/Cargo.toml
EXCEPTION: Unable to find a manifest for parking_lot:>=0.7.0,<=0.11.0
make[1]: *** [output-1.54.0/rustc] Error 1

The full log is available here: https://build.macports.org/builders/ports-10.14_x86_64-builder/builds/135608/steps/install-port/logs/stdio