wget http://www.gnuwakes.org/depot/1.0/main/sources/shadow-4.2.1.tar.xz

tar -xf shadow-4.2.1.tar.xz

wget http://www.gnuwakes.org/depot/1.0/main/sources/shadow.patch
cd shadow-4.2.1
patch -p1 < ../shadow.patch 
cd ..

SOURCES_DIR=$PWD/shadow-4.2.1
INSTALL_DIR=$PWD/shadow-4.2.1-install
BUILD_DIR=$PWD/shadow-4.2.1-build

mkdir $INSTALL_DIR $BUILD_DIR
cd $BUILD_DIR

$SOURCES_DIR/configure --sysconfdir=/etc --with-group-name-max-length=32 && \
  make && make DESTDIR=$INSTALL_DIR install
mv -v $INSTALL_DIR/usr/bin/passwd $INSTALL_DIR/bin