diff --git a/develop/clearsilver/clearsilver.conf b/develop/clearsilver/clearsilver.conf
index 20cc13f27..3c834ffd7 100644
--- a/develop/clearsilver/clearsilver.conf
+++ b/develop/clearsilver/clearsilver.conf
@@ -14,15 +14,16 @@
 # --- SDE-COPYRIGHT-NOTE-END ---
 
 # permanently disabling ruby beacause of compile errors 
-# disabling java and csharp module (mono support not testet till now)  
-var_append extraconfopt " " "--disable-ruby --disable-java --disable-csharp" 
+# disabling java and csharp module (mono support not testet till now)
+var_append extraconfopt " " "--disable-ruby --disable-java --disable-csharp"
 
 # correcting apache path
 if pkginstalled apache; then
-	var_append extraconfopt ' ' "--with-apache=$SDECFG_PKG_APACHE_PREFIX" 
-	var_append CFLAGS ' ' "-I/$SDECFG_PKG_APACHE_PREFIX/include"
-        var_append CPPFLAGS ' ' "-I/$SDECFG_PKG_APACHE_PREFIX/include"
-        var_append LDFLAGS ' ' "-L/$SDECFG_PKG_APACHE_PREFIX/lib"
+	pkgprefix -t apache
+	var_append extraconfopt ' ' "--with-apache=$root/$( pkgprefix apache )"
+	var_append CFLAGS ' ' "-I$root$( pkgprefix includedir apache )"
+        var_append CPPFLAGS ' ' "-I$root$( pkgprefix includedir apache )"
+        var_append LDFLAGS ' ' "-L$root$( pkgprefix libdir apache )"
         export CPPFLAGS CFLAGS LDFLAGS
 fi
 
@@ -35,7 +36,7 @@ else
         var_append extraconfopt " " "--disable-compression"
 fi
 
-# perl module 
+# perl module
 if pkginstalled perl; then
         var_append extraconfopt " " "--enable-perl"
 else
@@ -46,14 +47,13 @@ fi
 if pkginstalled python; then
 	pkgprefix -t python
 	PYVER=$( pkgprefix ver python | cut -d'.' -f1,2 )
-	var_append extraconfopt " " "--enable-python" 
+	var_append extraconfopt " " "--enable-python"
 	var_append extraconfopt " " "--with-python=/usr/bin/python$PYVER"
 else
 	var_append extraconfopt " " "--disable-python"
 fi
 
-# gettext  
+# gettext
 if pkginstalled gettext; then
 	var_append extraconfopt " " "--enable-gettext"
 fi
-