mpfr fails to build on 10.4.11; brew doctor notes that mpfr failed to import. Circular problem? Output from update,install,doctor,log,config attached.

mpfr_fails_10.4.11

$ brew update
Already up-to-date.

# Common Issues: none seem applicable

$ HOMEBREW_MAKE_JOBS=1 VERBOSE=1 brew install mpfr
Error: undefined method `<' for nil:NilClass
Please report this bug:
    https://github.com/mistydemeo/tigerbrew/wiki/troubleshooting
/usr/local/Library/Formula/mpfr.rb:17
/usr/local/Library/Homebrew/formula.rb:398:in `require'
/usr/local/Library/Homebrew/formula.rb:398:in `factory'
/usr/local/Library/Homebrew/extend/ARGV.rb:12:in `formulae'
/usr/local/Library/Homebrew/extend/ARGV.rb:12:in `map'
/usr/local/Library/Homebrew/extend/ARGV.rb:12:in `formulae'
/usr/local/Library/Homebrew/cmd/install.rb:25:in `install'
/usr/local/Library/brew.rb:82:in `send'
/usr/local/Library/brew.rb:82

# no log for mpfr
$ ls ~/Library/Logs/Homebrew/    
gettext         gnu-tar         jpeg            libgphoto2      libusb          libusb-compat   openssl         pkg-config

$ brew doctor
Error: Failed to import: mpfr
Your system is raring to brew.

$ brew --config
HOMEBREW_VERSION: 0.9.4
ORIGIN: https://github.com/mistydemeo/tigerbrew.git
HEAD: 4845a3a26dfd1ce53067e6fc1db9a0815474033e
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
CPU: single-core 32-bit g4e
OS X: 10.4.11-Power Macintosh
Xcode: 2.5
GCC-4.0: build 5370
LLVM-GCC: N/A
Clang: N/A
X11: 1.1.3 => /usr/X11R6
System Ruby: 1.8.2
Perl: /usr/bin/perl
Python: /usr/bin/python => /System/Library/Frameworks/Python.framework/Versions/2.3/bin/python
Ruby: /usr/bin/ruby