Bitcoin Core - autogen.sh failing on Mac

Bitcoin Core - autogen.sh failing on Mac

I'm working on installing Bitcoin Core for the mac. I've cloned the repo and installed the dependencies via brew. I'm trying to run autogen.sh but it is failing:

$ ./autogen.sh
/usr/local/bin/glibtoolize: line 406: /usr/local/Library/ENV/4.3/sed: No such file or directory
/usr/local/bin/glibtoolize: line 2513: /usr/local/Library/ENV/4.3/sed: No such file or directory
/usr/local/bin/glibtoolize: line 2513: /usr/local/Library/ENV/4.3/sed: No such file or directory
/usr/local/bin/glibtoolize: line 3601: /usr/local/Library/ENV/4.3/sed: No such file or directory
/usr/local/bin/glibtoolize: line 3845: /usr/local/Library/ENV/4.3/sed: No such file or directory
/usr/local/bin/glibtoolize: line 861: /usr/local/Library/ENV/4.3/sed: No such file or directory
: putting auxiliary files in '.'.
: copying file './ltmain.sh'
/usr/local/bin/glibtoolize: line 3771: /usr/local/Library/ENV/4.3/sed: No such file or directory
configure.ac:45: error: required file 'build-aux/ltmain.sh' not found
autoreconf: automake failed with exit status: 1

I'm not sure what is failing. brew doctor is clean. glibtoolize and sed can both be found. There is no .../Library/ENV directory, so I'm not sure why that isn't automatically getting created.

Any help would be greatly appreciated.

Mac 10.12.6
Bitcoin (7b57bc9) - v0.15.1

http://ift.tt/2CJ4Wll