diff --git a/buildpkg.functions b/buildpkg.functions
index 251338a..8643601 100644
--- a/buildpkg.functions
+++ b/buildpkg.functions
@@ -60,6 +60,7 @@ UNIQ=/bin/uniq
 BASENAME=/bin/basename
 DIRNAME=/bin/dirname
 TR=/bin/tr
+DIFF=/usr/local/bin/diff # *Must* support -u (like GNU Diff)
 
 # Groff stuff for manpages
 NEQN=/usr/local/bin/neqn
diff --git a/buildpkg.packaging.solaris b/buildpkg.packaging.solaris
index 7de8f46..285fb60 100644
--- a/buildpkg.packaging.solaris
+++ b/buildpkg.packaging.solaris
@@ -340,12 +340,19 @@ parse_def()
 # params: none
 check_unpackaged()
 {
+    local upf
+    local i
     $FIND . -type f -print|$SED -e 's/\.\///g' > $tmpdir/files.tmp
     $FIND . -type l -print|$SED -e 's/\.\///g' >> $tmpdir/files.tmp
     $FIND . -type d -print|$SED -e 's/\.\///g'|$GREP -v '^\.' >> $tmpdir/files.tmp
     $SORT $metadir/files.tmp|$UNIQ > $tmpdir/f1
     $SORT $tmpdir/files.tmp > $tmpdir/f2
     if [ ! "$($CMP $tmpdir/f1 $tmpdir/f2)" == "" ]; then
+	upf="$($DIFF -u $tmpdir/f1 $tmpdir/f2)"
+	for i in $upf
+	do
+	    echo $i
+	done
 	$RM -f $tmpdir/f1 $tmpdir/f2
 	error $E_UNPACKAGED_FILES check_unpackaged
     fi