Index: openacs-4/packages/richtext-ckeditor4/tcl/richtext-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/richtext-ckeditor4/tcl/richtext-procs.tcl,v
diff -u -r1.14.2.12 -r1.14.2.13
--- openacs-4/packages/richtext-ckeditor4/tcl/richtext-procs.tcl	16 Dec 2020 18:55:43 -0000	1.14.2.12
+++ openacs-4/packages/richtext-ckeditor4/tcl/richtext-procs.tcl	21 May 2021 07:40:57 -0000	1.14.2.13
@@ -378,7 +378,7 @@
         #
         foreach url [dict get $resource_info downloadURLs] {
             set fn [file tail $url]
-            set output [exec $unzip -o $resourceDir/$version/$fn -d $resourceDir/$version]
+            util::unzip -overwrite -source $resourceDir/$version/$fn -destination $resourceDir/$version
             file rename -- \
                 $resourceDir/$version/ckeditor \
                 $resourceDir/$version/$ck_package