homebrew gource error

$ brew install -v gource 2>&1
==> Downloading https://github.com/acaudwell/Gource/releases/download/gource-0.42/gource-0.42.tar.gz
Already downloaded: /opt/boxen/cache/homebrew/gource-0.42.tar.gz
==> Verifying gource-0.42.tar.gz checksum
tar xf /opt/boxen/cache/homebrew/gource-0.42.tar.gz
==> ./configure --disable-dependency-tracking --prefix=/opt/boxen/homebrew/Cellar/gource/0.42 --without-x
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... build-aux/install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking build system type... x86_64-apple-darwin13.2.0
checking host system type... x86_64-apple-darwin13.2.0
checking whether the C++ compiler works... yes
checking for C++ compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C++ compiler... yes
checking whether clang++ accepts -g... yes
checking for style of include used by make... GNU
checking dependency style of clang++... none
checking for timegm... yes
checking for unsetenv... yes
checking how to run the C++ preprocessor... clang++ -E
checking for X... disabled
checking for a sed that does not truncate output... /opt/boxen/homebrew/Library/ENV/4.3/sed
checking for gcc... clang
checking whether we are using the GNU C compiler... yes
checking whether clang accepts -g... yes
checking for clang option to accept ISO C89... none needed
checking whether clang understands -c and -o together... yes
checking dependency style of clang... none
checking for the pthreads library -lpthreads... no
checking whether pthreads work without any flags... yes
checking for joinable pthread attribute... PTHREAD_CREATE_JOINABLE
checking if more special flags are required for pthreads... -D_THREAD_SAFE
checking how to run the C preprocessor... clang -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking whether we are using the Microsoft C compiler... no
checking windows.h usability... no
checking windows.h presence... no
checking for windows.h... no
checking for GL/gl.h... no
checking for OpenGL/gl.h... yes
checking for OpenGL library... -lGL
checking for GL/glu.h... no
checking for OpenGL/glu.h... yes
checking for OpenGL Utility library... -lGLU
checking for varargs GLU tesselator callback function type... no
checking for pkg-config... /opt/boxen/homebrew/opt/pkg-config/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for FT2... yes
checking for PCRE... yes
checking for GLEW... yes
checking for SDL2... yes
checking for PNG... yes
checking for IMG_LoadPNG_RW... yes
checking for IMG_LoadJPG_RW... yes
checking for boostlib >= 1.46... yes
checking whether the Boost::System library is available... yes
checking whether the Boost::Filesystem library is available... yes
configure: error: Could not link against -lGLU !
==> Configuration
HOMEBREW_VERSION: 0.9.5
HEAD: bcbde4d94401399b6c34987c9c290b3450f9685e
HOMEBREW_PREFIX: /opt/boxen/homebrew
CPU: quad-core 64-bit ivybridge
OS X: 10.9.3-x86_64
Xcode: 5.1.1
CLT: 5.1.0.0.1.1396320587
X11: 2.7.5 => /opt/X11
==> ENV
HOMEBREW_CC: clang
HOMEBREW_CXX: clang++
CXXFLAGS: -I/opt/boxen/homebrew/include
MAKEFLAGS: -j4
CMAKE_PREFIX_PATH: /opt/boxen/homebrew
CMAKE_INCLUDE_PATH: /usr/include/libxml2:/System/Library/Frameworks/OpenGL.framework/Versions/Current/Headers
CMAKE_LIBRARY_PATH: /System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries
PKG_CONFIG_PATH: /opt/boxen/homebrew/opt/libpng/lib/pkgconfig:/opt/boxen/homebrew/opt/freetype/lib/pkgconfig:/opt/boxen/homebrew/opt/glew/lib/pkgconfig:/opt/boxen/homebrew/opt/pcre/lib/pkgconfig:/opt/boxen/homebrew/opt/sdl2/lib/pkgconfig:/opt/boxen/homebrew/opt/libtiff/lib/pkgconfig:/opt/boxen/homebrew/opt/webp/lib/pkgconfig:/opt/boxen/homebrew/opt/sdl2_image/lib/pkgconfig
PKG_CONFIG_LIBDIR: /usr/lib/pkgconfig:/opt/boxen/homebrew/Library/ENV/pkgconfig/10.9
ACLOCAL_PATH: /opt/boxen/homebrew/share/aclocal
PATH: /opt/boxen/homebrew/Library/ENV/4.3:/opt/boxen/homebrew/opt/pkg-config/bin:/opt/boxen/homebrew/opt/libpng/bin:/opt/boxen/homebrew/opt/freetype/bin:/opt/boxen/homebrew/opt/glew/bin:/opt/boxen/homebrew/opt/jpeg/bin:/opt/boxen/homebrew/opt/pcre/bin:/opt/boxen/homebrew/opt/sdl2/bin:/opt/boxen/homebrew/opt/libtiff/bin:/opt/boxen/homebrew/opt/webp/bin:/usr/bin:/bin:/usr/sbin:/sbin

Error: gource 0.42 did not build
Logs:
     /Users/philipp/Library/Logs/Homebrew/gource/01.configure
     /Users/philipp/Library/Logs/Homebrew/gource/01.configure.cc
     /Users/philipp/Library/Logs/Homebrew/gource/config.log