* installing *source* package ‘fastgeojson’ ...
** this is package ‘fastgeojson’ version ‘0.1.2’
** package ‘fastgeojson’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C compiler: ‘Apple clang version 14.0.3 (clang-1403.0.22.14.1)’
using SDK: ‘MacOSX11.3.sdk’
clang -arch x86_64 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/opt/R/x86_64/include    -fPIC  -falign-functions=64 -Wall -g -O2  -c entrypoint.c -o entrypoint.o
rm -rf rust/target rust/.cargo rust/vendor
== fastgeojson: Rust toolchain ==
rustc --version
make: rustc: No such file or directory
make: *** [rust/target/release/libfastgeojson.a] Error 1
make: *** Waiting for unfinished jobs....
ERROR: compilation failed for package ‘fastgeojson’
* removing ‘/Volumes/Builds/packages/big-sur-x86_64/results/4.5/fastgeojson.Rcheck/fastgeojson’