Error: make default

[dapeng1993]

Dear Sir,
When I run ''make default'', I got the follwing message:

(base) root@iZbp179omj4oyxhfll6amcZ:/test/angelix# make default
cd build && wget --retry-connrefused --waitretry=1 --read-timeout=20 --timeout=15 --tries=5 --continue http://llvm.org/releases/2.9/llvm-gcc4.2-2.9-x86_64-linux.tar.bz2
/bin/sh: 1: cd: can't cd to build
Makefile:74: recipe for target 'build/llvm-gcc4.2-2.9-x86_64-linux.tar.bz2' failed
make: *** [build/llvm-gcc4.2-2.9-x86_64-linux.tar.bz2] Error 2
(base) root@iZbp179omj4oyxhfll6amcZ:/test/angelix#