diff --git a/Jamrules b/Jamrules
index 4874276270..87bdb20449 100644
--- a/Jamrules
+++ b/Jamrules
@@ -2113,8 +2113,8 @@ rule PackageZip
 }
 
 actions together PackageZip1 {
-	cd $(OBOS_PACKAGE_DIR) ;
-	zip -rq $(1:BS) $(2:BS) ;
+	cd "$(OBOS_PACKAGE_DIR)" ;
+	zip -rq "$(1:BS)" "$(2:BS)" ;
 }
 
 rule PackageInstallScript
@@ -2128,27 +2128,27 @@ actions together PackageInstallScript1
 {
 echo '#!/bin/sh
 base=`dirname "$0"`
-cd $base
+cd "$base"
 if [ -n "$TTY" ]
 then
-	unzip -d / install.zip
+    unzip -d / install.zip
 else
-	response=`alert "Would you like to automatically overwrite existing files, or receive a prompt?" "Overwrite" "Prompt"`
-	if [ $response == "Overwrite" ]
-	then
-		unzip -od / install.zip
-		alert "Finished installing" "Thanks"
-	else
-		if [ -e /boot/beos/apps/Terminal ]
-		then
-			terminal=/boot/beos/apps/Terminal
-		else
-			terminal=`query Terminal | head -1`
-		fi
-		$terminal -t "installer" /bin/sh $0
-	fi
-fi' > $(1) ;
-	chmod 755 $(1) ;
+    response=`alert "Would you like to automatically overwrite existing files, or receive a prompt?" "Overwrite" "Prompt"`
+    if [ $response == "Overwrite" ]
+    then
+        unzip -od / install.zip
+        alert "Finished installing" "Thanks"
+    else
+        if [ -e /boot/beos/apps/Terminal ]
+        then
+            terminal=/boot/beos/apps/Terminal
+        else
+            terminal=`query Terminal | head -1`
+        fi
+        $terminal -t "installer" /bin/sh "$0"
+    fi
+fi' > "$(1)" ;
+	chmod 755 "$(1)" ;
 }
 
 rule PackageInstallZip
@@ -2159,8 +2159,8 @@ rule PackageInstallZip
 
 actions together PackageInstallZip
 {
-	cd $(1:P) ;
-	zip -rqy $(1:BS) boot ;
+	cd "$(1:P)" ;
+	zip -rqy "$(1:BS)" boot ;
 }
 
 rule LinkInstallZip
@@ -2171,5 +2171,5 @@ rule LinkInstallZip
 
 actions together LinkInstallZip
 {
-	ln -sf `pwd`/"$(2)" "$(1)" ;
+	ln -sf "`pwd`/$(2)" "$(1)" ;
 }