--- a/configure
+++ b/configure
@@ -327,9 +327,9 @@
 SNOLIB_LOCAL="$SNOLIB/local"
 SNOLIB_DOC="$SNOLIB"
 # XXX use $PREFIX/include/snobol4 ???
-INCLUDE_DIR="$SNOLIB/include"
+INCLUDE_DIR="$PREFIX"/include/snolib4

-DOC_DIR="$PREFIX/share/doc/snobol4-$VERSION"
+DOC_DIR="$doc/share/doc/snobol4-$VERSION"

 echo 'BINDIR=$(DESTDIR)'"$BINDIR"    >> $CONFIG_M4
 echo 'MANDIR=$(DESTDIR)'"$MANDIR"    >> $CONFIG_M4
@@ -2110,7 +2110,7 @@
 # IRIX /sbin/install

 # should always find ./install-sh
-for DIR in /usr/bin /usr/ucb /usr/local/bin /bin .; do
+for DIR in `echo $PATH | tr ':' ' '`; do
     for INSTALL in install ginstall scoinst install-sh; do
  IPATH=$DIR/$INSTALL
  if [ -d $IPATH ]; then