Installation of Instapy Error - Please Help! :D

ERROR: Command errored out with exit status 1:
command: /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/st/tk1rvd1j7dq9gkqt5jfn1_nr0000gn/T/pip-install-BCVkND/regex/setup.py'"'"'; __file__='"'"'/private/var/folders/st/tk1rvd1j7dq9gkqt5jfn1_nr0000gn/T/pip-install-BCVkND/regex/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/st/tk1rvd1j7dq9gkqt5jfn1_nr0000gn/T/pip-record-mwb5XY/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /Users/carlos/Library/Python/2.7/include/python2.7/regex
cwd: /private/var/folders/st/tk1rvd1j7dq9gkqt5jfn1_nr0000gn/T/pip-install-BCVkND/regex/
Complete output (17 lines):
running install
running build
running build_py
creating build
creating build/lib.macosx-10.15-x86_64-2.7
creating build/lib.macosx-10.15-x86_64-2.7/regex
copying regex_2/__init__.py -> build/lib.macosx-10.15-x86_64-2.7/regex
copying regex_2/regex.py -> build/lib.macosx-10.15-x86_64-2.7/regex
copying regex_2/_regex_core.py -> build/lib.macosx-10.15-x86_64-2.7/regex
copying regex_2/test_regex.py -> build/lib.macosx-10.15-x86_64-2.7/regex
running build_ext
building 'regex._regex' extension
creating build/temp.macosx-10.15-x86_64-2.7
creating build/temp.macosx-10.15-x86_64-2.7/regex_2
cc -fno-strict-aliasing -fno-common -dynamic -g -Os -pipe -fno-common -fno-strict-aliasing -fwrapv -DENABLE_DTRACE -DMACOSX -DNDEBUG -Wall -Wstrict-prototypes -Wshorten-64-to-32 -iwithsysroot /usr/local/libressl/include -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch x86_64 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c regex_2/_regex.c -o build/temp.macosx-10.15-x86_64-2.7/regex_2/_regex.o
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
error: command 'cc' failed with exit status 1
----------------------------------------
ERROR: Command errored out with exit status 1: /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/st/tk1rvd1j7dq9gkqt5jfn1_nr0000gn/T/pip-install-BCVkND/regex/setup.py'"'"'; __file__='"'"'/private/var/folders/st/tk1rvd1j7dq9gkqt5jfn1_nr0000gn/T/pip-install-BCVkND/regex/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/st/tk1rvd1j7dq9gkqt5jfn1_nr0000gn/T/pip-record-mwb5XY/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /Users/carlos/Library/Python/2.7/include/python2.7/regex Check the logs for full command output.

Start with the reported Python 2.7 pip installation command and the regex package build output, especially the missing xcrun error. Review the repository's installation or quickstart guidance and determine whether the failure is project-specific; done means the documented setup completes successfully on the reported macOS environment.

Written by the indexing model from the issue text.