libtool is missing a "Requires: sed". This is causing builds to fail left, right, and center.
True cause found. Line 156 of affected libtool scripts reads 'ECHO="echo"' when it should read 'echo="echo"'.
Created attachment 325539 [details] Patch to fix the echo issue
The problem is mismatched files between the source and libtool. Forcing libtoolize is the correct fix.