$ LANG=C sudo pacman -S skype --debug 2>pacmanS-debug.log

resolving dependencies...
:: There are 3 providers available for lib32-libgl:
:: Repository multilib
   1) lib32-mesa-libgl  2) lib32-nvidia-304xx-libgl  3) lib32-nvidia-libgl
1
looking for inter-conflicts...

Packages (64): lib32-alsa-lib-1.0.28-1  lib32-attr-2.4.47-1  lib32-bzip2-1.0.6-1  lib32-elfutils-0.158-2  lib32-expat-2.1.0-1  lib32-flac-1.3.0-1
               lib32-fontconfig-2.11.1-1  lib32-freetype2-2.5.3-1  lib32-gcc-libs-4.9.0-5  lib32-glib2-2.40.0-1  lib32-glibc-2.19-5  lib32-harfbuzz-0.9.28-1
               lib32-icu-53.1-1  lib32-json-c-0.12-1  lib32-lcms2-2.6-1  lib32-libasyncns-0.8-6  lib32-libcap-2.24-1  lib32-libdbus-1.8.4-1
               lib32-libdrm-2.4.54-1  lib32-libffi-3.1-1  lib32-libgcrypt-1.6.1-1  lib32-libgpg-error-1.13-1  lib32-libice-1.0.9-1
               lib32-libjpeg-turbo-1.3.1-1  lib32-libmng-2.0.2-1  lib32-libogg-1.3.1-1  lib32-libpciaccess-0.13.2-1  lib32-libpng-1.6.10-1
               lib32-libpulse-5.0-1  lib32-libsm-1.2.2-1  lib32-libsndfile-1.0.25-2  lib32-libtiff-4.0.3-2  lib32-libvdpau-0.7-2  lib32-libvorbis-1.3.4-1
               lib32-libx11-1.6.2-1  lib32-libxau-1.0.8-1  lib32-libxcb-1.10-2  lib32-libxcursor-1.1.14-1  lib32-libxdamage-1.1.4-1  lib32-libxdmcp-1.1.1-1
               lib32-libxext-1.3.2-1  lib32-libxfixes-5.0.1-1  lib32-libxi-1.7.2-1  lib32-libxrandr-1.4.2-1  lib32-libxrender-0.9.8-1
               lib32-libxshmfence-1.1-1  lib32-libxss-1.2.2-1  lib32-libxtst-1.2.2-1  lib32-libxv-1.0.10-1  lib32-libxxf86vm-1.1.3-1  lib32-llvm-libs-3.4.2-1
               lib32-mesa-10.2.2-1  lib32-mesa-libgl-10.2.2-1  lib32-openssl-1.0.1.h-1  lib32-pcre-8.35-1  lib32-qt4-4.8.6-1  lib32-sqlite-3.8.5-1
               lib32-systemd-214-1  lib32-util-linux-2.24.2-1  lib32-v4l-utils-1.0.1-1  lib32-wayland-1.5.0-1  lib32-xz-5.0.5-1  lib32-zlib-1.2.8-1
               skype-4.3.0.37-3

Total Installed Size:   214.40 MiB

y
checking keyring...
checking package integrity...
loading package files...
checking for file conflicts...
checking available disk space...
installing lib32-glibc...
installing lib32-expat...
installing lib32-libdbus...
installing lib32-json-c...
installing lib32-gcc-libs...
installing lib32-pcre...
installing lib32-zlib...
installing lib32-libffi...
installing lib32-glib2...
installing lib32-libgpg-error...
installing lib32-libgcrypt...
installing lib32-xz...
installing lib32-systemd...
installing lib32-libasyncns...
installing lib32-attr...
installing lib32-libcap...
installing lib32-libxdmcp...
installing lib32-libxau...
installing lib32-libxcb...
installing lib32-libx11...
installing lib32-libxext...
installing lib32-libxfixes...
installing lib32-libxi...
installing lib32-libxtst...
installing lib32-libice...
installing lib32-util-linux...
installing lib32-libsm...
installing lib32-libogg...
installing lib32-flac...
installing lib32-libvorbis...
installing lib32-libsndfile...
installing lib32-libpulse...
Optional dependencies for lib32-libpulse
    lib32-alsa-plugins: ALSA support
installing lib32-bzip2...
installing lib32-libpng...
installing lib32-icu...
installing lib32-harfbuzz...
installing lib32-freetype2...
installing lib32-fontconfig...
updating font cache... done.
installing lib32-sqlite...
installing lib32-alsa-lib...
installing lib32-openssl...
Optional dependencies for lib32-openssl
    ca-certificates [installed]
installing lib32-libjpeg-turbo...
installing lib32-libtiff...
installing lib32-lcms2...
installing lib32-libmng...
installing lib32-libpciaccess...
installing lib32-libdrm...
installing lib32-libxxf86vm...
installing lib32-libxdamage...
installing lib32-libxshmfence...
installing lib32-elfutils...
installing lib32-llvm-libs...
installing lib32-libvdpau...
installing lib32-wayland...
installing lib32-mesa...
Optional dependencies for lib32-mesa
    opengl-man-pages: for the OpenGL API man pages
installing lib32-mesa-libgl...
installing lib32-libxrender...
installing lib32-libxrandr...
installing lib32-libxv...
installing lib32-qt4...
Optional dependencies for lib32-qt4
    lib32-libxinerama: Xinerama support
    lib32-libxcursor: Xcursor support [pending]
    lib32-libxfixes: Xfixes support [installed]
installing lib32-libxss...
installing lib32-libxcursor...
installing lib32-v4l-utils...
installing skype...
Important update note: Since Skype 4.3, only PulseAudio is supported.
That means you NEED a working PulseAudio setup to use Skype for voice chatting.
If you get distorted sound in skype, try adding PULSE_LATENCY_MSEC=60 to your
env before starting skype. Something like 'export PULSE_LATENCY_MSEC=60' in .bashrc, for example.
Optional dependencies for skype
    pulseaudio: audio support/voice chatting
    lib32-libcanberra: XDG sound support