The given value 'privoxy' does not match group entry

[me@…]

OSX 10.6 XCode 3.2 MacPorts 1.8.99

albino:~ gyaresu$ sudo port install privoxy ---> Computing dependencies for privoxy ---> Configuring privoxy Error: Target org.macports.configure returned: configure failure: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_www_privoxy/work/privoxy-3.0.12-stable" && ./configure --prefix=/opt/local --with-user=privoxy --with-group=privoxy --sysconfdir=/opt/local/etc/privoxy --mandir=/opt/local/share/man --enable-dynamic-pcre --enable-zlib " returned error 1 Command output: checking build system type... i386-apple-darwin10.0.0 checking host system type... i386-apple-darwin10.0.0 checking for gcc... /usr/bin/gcc-4.2 checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether /usr/bin/gcc-4.2 accepts -g... yes checking for /usr/bin/gcc-4.2 option to accept ISO C89... none needed checking how to run the C preprocessor... /usr/bin/gcc-4.2 -E checking for a BSD-compatible install... /usr/bin/install -c checking whether ln -s works... yes checking whether make sets $(MAKE)... yes checking for gawk... gawk checking for gdb... yes checking for groups... /usr/bin/groups checking for id... /usr/bin/id checking for user... privoxy checking for group... privoxy configure: error: The given value 'privoxy' does not match group entry

Error: Status 1 encountered during processing.