ros-core install troubles on arch linux

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Hello,

I am trying to install ROS Fuerte on Arch Linux, and am running into issues with the ros-core package. The computer is a 64-bit system, if that matters. I have been unable to find any error reports or guides that would help me resolve this issue; everything in the Arch Wiki and the ROS documentation that I have found seems to assume that ros-core installs, so I'm stuck.

Upon trying to build, I get the following error message from yaourt (AUR wrapper for pacman package manager);

==> Continue building ros-core ? [Y/n]
==> ----------------------------------
==> 
==> Building and installing package
==> Making package: ros-core 1.8.4-1 (Fri Jun 22 21:13:25 PDT 2012)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving Sources...
==> Extracting Sources...
==> Removing existing pkg/ directory...
==> Starting build()...
--2012-06-22 21:13:25--  http://ros.org/rosinstalls/fuerte-ros-full.rosinstall
Resolving ros.org... 157.22.19.144
Connecting to ros.org|157.22.19.144|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1920 (1.9K) [text/plain]
Saving to: `/tmp/yaourt-tmp-scrye/aur-ros-core/src/ros-underlay/.rosinstall'

100%[===========================>] 1,920       --.-K/s   in 0.004s  

2012-06-22 21:13:25 (490 KB/s) - `/tmp/yaourt-tmp-scrye/aur-ros-core/src/ros-underlay/.rosinstall' saved [1920/1920]

/tmp/yaourt-tmp-scrye/aur-ros-core/./PKGBUILD: line 25: rosinstall: command not found
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Makepkg was unable to build ros-core.
==> Restart building ros-core ? [y/N]
==> ---------------------------------

I tried moving rosinstall to /usr/bin and it was recognized, but then the following occurs;

==> Building and installing package
==> Making package: ros-core 1.8.4-1 (Fri Jun 22 21:17:33 PDT 2012)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving Sources...
==> Extracting Sources...
==> Removing existing pkg/ directory...
==> Starting build()...
--2012-06-22 21:17:33--  http://ros.org/rosinstalls/fuerte-ros-full.rosinstall
Resolving ros.org... 157.22.19.144
Connecting to ros.org|157.22.19.144|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1920 (1.9K) [text/plain]
Saving to: `/tmp/yaourt-tmp-scrye/aur-ros-core/src/ros-underlay/.rosinstall'

100%[===========================>] 1,920       --.-K/s   in 0s      

2012-06-22 21:17:33 (346 MB/s) - `/tmp/yaourt-tmp-scrye/aur-ros-core/src/ros-underlay/.rosinstall' saved [1920/1920]

/usr/bin/rosinstall: line 1: -: command not found
/usr/bin/rosinstall: line 2: local-name:: command not found
/usr/bin/rosinstall: line 3: uri:: command not found
/usr/bin/rosinstall: line 4: version:: command not found
/usr/bin/rosinstall: line 5: -: command not found
/usr/bin/rosinstall: line 6: local-name:: command not found
/usr/bin/rosinstall: line 7: uri:: command not found
/usr/bin/rosinstall: line 8: version:: command not found
/usr/bin/rosinstall: line 9: -: command not found
/usr/bin/rosinstall: line 10: local-name:: command not found
/usr/bin/rosinstall: line 11: uri:: command not found
/usr/bin/rosinstall: line 12: version:: command not found
/usr/bin/rosinstall: line 13: -: command not found
/usr/bin/rosinstall: line 14: local-name:: command not found
/usr/bin/rosinstall: line 15: uri:: command not found
/usr/bin/rosinstall: line 16: version:: command not found
/usr/bin/rosinstall: line 17: -: command not found
/usr/bin/rosinstall ...