Je suis vraiment un nouveau sous Arch, ne m'en voulez pas de ne pas tout comprendre

A cette adresse https://aur.archlinux.org/packages.php?ID=42311, j'ai récupéré le PKGBUILD dans le dernier commentaire pour essayer d'installer Unity.
mais voici mon souci :
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╒══|yionel@myhost|════════╕[unity]
└─[$]─> makepkg
==> Création du paquet unity 3.8.14-1 (dim. juin 12 02:25:55 CEST 2011)
==> Vérification des dépendances pour l'exécution...
==> Dépendances manquantes :
-> nux-bzr
-> clutk
-> dee
-> bamf
==> Vérification des dépendances pour la compilation...
==> ERREUR: Échec de résolution des dépendances.
Avec nux-bzr
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==> Lancement de build()...
==> Connecting to the server....
You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data. See "bzr help launchpad-login".
==> BZR checkout done or server timeout
==> Starting make...
patching file NuxImage/NPng.cpp
patch unexpectedly ends in middle of line
Hunk #2 succeeded at 463 with fuzz 1.
patching file NuxGraphics/GLSh_DrawFunction.cpp
Hunk #1 FAILED at 157.
1 out of 1 hunk FAILED -- saving rejects to file NuxGraphics/GLSh_DrawFunction.cpp.rej
patching file NuxGraphics/GLSh_ColorPicker.cpp
Hunk #1 FAILED at 376.
1 out of 1 hunk FAILED -- saving rejects to file NuxGraphics/GLSh_ColorPicker.cpp.rej
patching file NuxGraphics/RenderingPipeGLSL.cpp
Hunk #1 succeeded at 900 (offset -3 lines).
Hunk #2 succeeded at 962 (offset -3 lines).
Hunk #3 succeeded at 1039 (offset -3 lines).
Hunk #4 succeeded at 1123 with fuzz 1 (offset -3 lines).
Hunk #5 succeeded at 1201 with fuzz 1 (offset -3 lines).
Hunk #6 succeeded at 1278 with fuzz 1 (offset -3 lines).
Hunk #7 succeeded at 1368 with fuzz 1 (offset -3 lines).
Hunk #8 succeeded at 1448 (offset -3 lines).
Hunk #9 succeeded at 1502 (offset -3 lines).
Hunk #10 succeeded at 1568 (offset -3 lines).
Hunk #11 succeeded at 1644 with fuzz 1 (offset -3 lines).
Hunk #12 succeeded at 1706 with fuzz 1 (offset -3 lines).
Hunk #13 succeeded at 1776 (offset -3 lines).
Hunk #14 succeeded at 1848 (offset -3 lines).
Hunk #15 succeeded at 1918 (offset -3 lines).
Hunk #16 succeeded at 1990 (offset -3 lines).
Hunk #17 succeeded at 2069 (offset -3 lines).
Hunk #18 succeeded at 2521 (offset -3 lines).
==> ERREUR: Une erreur s'est produite dans build().
Abandon...
==> ERREUR: Makepkg n'a pas pu construire .
==> Relancer la compilation de nux-bzr ? [o/N]
==> ------------------------------------------
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checking whether to build static libraries... no
checking for glib-mkenums... /usr/bin/glib-mkenums
checking for ANSI C header files... (cached) yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking for stdlib.h... (cached) yes
checking for string.h... (cached) yes
checking for unistd.h... (cached) yes
checking for an ANSI C-conforming const... yes
checking for stdlib.h... (cached) yes
checking for GNU libc compatible malloc... yes
checking for stdlib.h... (cached) yes
checking for unistd.h... (cached) yes
checking for getpagesize... yes
checking for working mmap... yes
checking for memset... yes
checking for munmap... yes
checking for strcasecmp... yes
checking for strdup... yes
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for CLUTTER... yes
checking for CLUTTER_GTK... configure: error: Package requirements (clutter-gtk-0.10 >= 0.10.0) were not met:
No package 'clutter-gtk-0.10' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables CLUTTER_GTK_CFLAGS
and CLUTTER_GTK_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
==> ERREUR: Une erreur s'est produite dans build().
Abandon...
==> ERREUR: Makepkg n'a pas pu construire clutk.
==> Relancer la compilation de clutk ? [o/N]
==> ----------------------------------------


Que dois je faire ?