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 -r1.109.2.26 -r1.109.2.27
--- openacs-4/packages/acs-tcl/tcl/apm-install-procs.tcl	7 Aug 2017 13:34:17 -0000	1.109.2.26
+++ openacs-4/packages/acs-tcl/tcl/apm-install-procs.tcl	7 Aug 2017 21:11:23 -0000	1.109.2.27
@@ -85,12 +85,11 @@
     set old_version_p 0
     set found_p 0
     ns_log Debug "apm_dependency_provided_p: Scanning for $dependency_uri version $dependency_version"
-    foreach service_version [db_list get_service_versions {}] {
-        set version_p [expr {[apm_version_names_compare $service_version $dependency_version] >= 0}]
-        if { $version_p } {
+    db_foreach apm_dependency_check {} {
+        if { $version_p >= 0 } {
             ns_log Debug "apm_dependency_provided_p: Dependency satisfied by previously installed package"
             set found_p 1
-        } else {
+        } elseif { $version_p == -1 } {
             set old_version_p 1
         }
     }
@@ -106,8 +105,9 @@
             if {$dependency_uri eq [lindex $prov 0]} {
 
                 set provided_version [lindex $prov 1]
-                set provided_p [expr {[apm_version_names_compare $provided_version $dependency_version] >= 0}]
-                if { $provided_p } {
+                set provided_p [db_string version_greater_p {}]
+
+                if { $provided_p >= 0 } {
                     ns_log Debug "apm_dependency_provided_p: Dependency satisfied in list of provisions."
                     return 1
                 } else {