我正在尝试安装 sassc 但构建本机扩展失败：
$ gem install sassc
Building native extensions. This could take a while...
ERROR: Error installing sassc:
ERROR: Failed to build gem native extension.
current directory: /data/hermes/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/sassc-2.2.1/ext
/data/hermes/.rbenv/versions/2.7.0/bin/ruby -I /data/hermes/.rbenv/versions/2.7.0/lib/ruby/2.7.0 -r
./siteconf20200114-2123-fk2nkv.rb extconf.rb
creating Makefile
current directory: /data/hermes/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/sassc-2.2.1/ext
make "DESTDIR=" clean
current directory: /data/hermes/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/sassc-2.2.1/ext
make "DESTDIR="
compiling ./libsass/src/cencode.c
compiling ./libsass/src/c99func.c
compiling ./libsass/src/environment.cpp
In file included from ./libsass/src/environment.cpp:1:0:
./libsass/src/sass.hpp:55:18: fatal error: string: No such file or directory
compilation terminated.
make: *** [environment.o] Error 1
make failed, exit code 2 …