Index: solenv/gbuild/Jar.mk
===================================================================
--- solenv/gbuild/Jar.mk.orig
+++ solenv/gbuild/Jar.mk
@@ -201,6 +201,11 @@ $$(call gb_Output_error,\
  gb_Jar_add_jars: use gb_Jar_use_jars instead.)
 endef
 
+# specify Xbootclasspath/p
+define gb_Jar_prepend_xboot_jars
+$(call gb_JavaClassSet_prepend_xboot_jars,$(call gb_Jar_get_classsetname,$(1)),$(2))
+endef
+
 # specify jars with imported modules
 define gb_Jar_use_jars
 $(call gb_JavaClassSet_use_jars,$(call gb_Jar_get_classsetname,$(1)),$(2))
Index: solenv/gbuild/JavaClassSet.mk
===================================================================
--- solenv/gbuild/JavaClassSet.mk.orig
+++ solenv/gbuild/JavaClassSet.mk
@@ -46,6 +46,8 @@ $(call gb_Helper_abbreviate_dirs,\
 			$(filter-out $(JARDEPS),$(4))) && \
 		$(if $(3),$(gb_JavaClassSet_JAVACCOMMAND) \
 			$(gb_JavaClassSet_JAVACDEBUG) \
+			$(gb_JavaClassSet_XBOOTCLASSPATH) \
+			-Xbootclasspath/p:$(XBOOT_CP_P) \
 			-cp "$(T_CP)$(gb_CLASSPATHSEP)$(call gb_JavaClassSet_get_classdir,$(2))" \
 			-d $(call gb_JavaClassSet_get_classdir,$(2)) \
 			@$$RESPONSEFILE &&) \
@@ -112,6 +114,18 @@ $$(call gb_Output_error,\
  gb_JavaClassSet_add_jar: use gb_JavaClassSet_use_jar instead.)
 endef
 
+
+# Xbootclasspath
+define gb_JavaClassSet_prepend_xboot_jar
+$(eval $(call gb_JavaClassSet_get_target,$(1)) : $(2))
+$(eval $(call gb_JavaClassSet_get_target,$(1)) : XBOOT_CP_P := $$(XBOOT_CP_P)$(gb_CLASSPATHSEP)$(strip $(2)))
+$(eval $(call gb_JavaClassSet_get_target,$(1)) : JARDEPS += $(2))
+endef
+
+define gb_JavaClassSet_prepend_xboot_jars
+$(foreach jar,$(2),$(call gb_JavaClassSet_prepend_xboot_jar,$(1),$(jar)))
+endef
+
 # problem: currently we can't get these dependencies to work
 # build order dependency is a hack to get these prerequisites out of the way in the build command
 define gb_JavaClassSet_use_jar
Index: scripting/Jar_ScriptProviderForJavaScript.mk
===================================================================
--- scripting/Jar_ScriptProviderForJavaScript.mk.orig
+++ scripting/Jar_ScriptProviderForJavaScript.mk
@@ -40,6 +40,10 @@ $(eval $(call gb_Jar_use_externals,Scrip
 	rhino \
 ))
 
+$(eval $(call gb_Jar_prepend_xboot_jars,ScriptProviderForJavaScript,\
+	$(OUTDIR)/bin/js.jar \
+))
+
 $(eval $(call gb_Jar_set_manifest,ScriptProviderForJavaScript,$(SRCDIR)/scripting/java/com/sun/star/script/framework/provider/javascript/MANIFEST.MF))
 
 $(eval $(call gb_Jar_set_jarclasspath,ScriptProviderForJavaScript, \