Bugzilla Bug 199748

emerging nant-0.85 fails with the following error:

mono bootstrap/NAnt.exe -t:mono-2.0 -f:NAnt.build build
NAnt 0.85 (Build 0.85.2478.0; release; 10/14/2006)
Copyright (C) 2001-2006 Gerry Shaw
http://nant.sourceforge.net

BUILD FAILED

The current runtime framework 'mono-2.0' is not correctly configured in the
NAnt configuration file.
    Function call failed.
Expression: ${path::combine(prefix, 'lib/mono/1.0')}
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        Illegal characters in path
Parameter name: path1


It looks like (closed) bug #130689, but it is for a newer version of nant,
different architecture and different profile, so I decided to open a new one.

My emerge --info:
Portage 2.1.3.19 (hardened/x86/2.6, gcc-3.4.6, glibc-2.6.1-r0,
2.6.22-hardened-r8 i686)
=================================================================
System uname: 2.6.22-hardened-r8 i686 Intel(R) Pentium(R) 4 CPU 2.80GHz
Timestamp of tree: Tue, 20 Nov 2007 03:00:01 +0000
ccache version 2.4 [enabled]
app-shells/bash:     3.2_p17
dev-java/java-config: 1.3.7, 2.0.33-r1
dev-lang/python:     2.4.4-r6
dev-python/pycrypto: 2.0.1-r6
dev-util/ccache:     2.4-r7
sys-apps/baselayout: 2.0.0_rc6
sys-apps/sandbox:    1.2.18.1-r2
sys-devel/autoconf:  2.61-r1
sys-devel/automake:  1.9.6-r2, 1.10
sys-devel/binutils:  2.18-r1
sys-devel/gcc-config: 1.3.16
sys-devel/libtool:   1.5.24
virtual/os-headers:  2.6.22-r2
ACCEPT_KEYWORDS="x86"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-O3 -pipe -march=pentium4 -mmmx -msse2 -fprefetch-loop-arrays
-fforce-addr -falign-functions=4 -maccumulate-outgoing-args
-fomit-frame-pointer"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /var/qmail/alias /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/gconf /etc/gentoo-release
/etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/
/etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/terminfo
/etc/udev/rules.d"
CXXFLAGS="-O3 -pipe -march=pentium4 -mmmx -msse2 -fprefetch-loop-arrays
-fforce-addr -falign-functions=4 -maccumulate-outgoing-args"
DISTDIR="/var/cache/distfiles"
FEATURES="ccache collision-protect distlocks fixpackages nodoc noinfo noman
parallel-fetch sandbox sfperms strict unmerge-orphans userfetch"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/linux/distributions/gentoo"
LINGUAS="en_US"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude=/distfiles --exclude=/local --exclude=/packages
--filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="acpi aliaschain alsa apache2 bash-completion bzip2 cdr chroot cli cracklib
crypt dbus dvd dvdr enscript erandom exif gd gdbm glibc-omitfp hardened hdri
innodb iproute2 java jpeg maildir mmx mono mpm-worker multipleip mysql mysqli
ncurses nfs nolvm1 nptl nptlonly pam pcre pic postgres profile readline
reiserfs roundrobin semanticfix server session slang sse sse2 ssl sysvipc tcpd
threads unicode urandom usb userlocales vhosts vim-syntax x86 xml xorg zlib"
ALSA_CARDS="intel8x0" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop
empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi
null plug rate route share shm softvol" ELIBC="glibc" INPUT_DEVICES="mouse
keyboard" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216
lcdm001 mtxorb ncurses text" LINGUAS="en_US" USERLAND="GNU" VIDEO_CARDS="apm
ark chips cirrus cyrix dummy fbdev glint i128 i740 i810 imstt mach64 mga
neomagic nsc nv r128 radeon rendition s3 s3virge savage siliconmotion sis
sisusb tdfx tga trident tseng v4l vesa vga via vmware voodoo"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL,
LDFLAGS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS,
PORTDIR_OVERLAY

Fixed in CVS, thanks for reporting!