Index: openacs-4/packages/acs-tcl/tcl/apm-install-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/apm-install-procs.tcl,v
diff -u -N -r1.109.2.19 -r1.109.2.20
--- openacs-4/packages/acs-tcl/tcl/apm-install-procs.tcl	27 Mar 2017 10:33:29 -0000	1.109.2.19
+++ openacs-4/packages/acs-tcl/tcl/apm-install-procs.tcl	28 Mar 2017 06:46:51 -0000	1.109.2.20
@@ -805,7 +805,7 @@
         }
 
         # Move the package into the packages dir        
-        file rename $package_path $::acs::rootdir/packages
+        file rename -- $package_path $::acs::rootdir/packages
 
         # We moved the spec file, so update its path
         set package_path $old_package_path
@@ -1130,7 +1130,7 @@
     apm_callback_and_log $callback "
     <li>Moving <tt>packages/$package_key</tt> to $backup_dir... "
 
-    if { [catch { file rename "$::acs::rootdir/packages/$package_key" $backup_dir } error] } {
+    if { [catch { file rename -- "$::acs::rootdir/packages/$package_key" $backup_dir } error] } {
         apm_callback_and_log $callback "<font color=red>[ns_quotehtml $error]</font>"
     } else {
         apm_callback_and_log $callback "moved."