diff --git a/update_psa_helpers b/update_psa_helpers
old mode 100644
new mode 100755
index 60520d7..d9bde06
--- a/update_psa_helpers
+++ b/update_psa_helpers
@@ -6,25 +6,16 @@
 #    return 0
 #fi
 
+source ./general_utils
+
 exec_opkg_command () {
     local func="${FUNCNAME[0]}"
-    
     log_debug "$func:${LINENO} exec-ing [$*]"
 
-    exec {fd}< <(eval "$@")
-    local ps_pid=$!             # remember pid of process substitution
+    local __result=$(exec_process_substitution $*)
+    log_debug "$func:${LINENO} result=$__result"
 
-    local opkg_result=""
-    while read tmp <&$fd; do
-        if ! [ -z "$tmp" ]; then
-            opkg_result="${opkg_result}$tmp"
-        fi
-    done
-        
-    exec {fd}>&-                # close fd (i.e. process substitution)
-    wait $ps_pid                # wait for the subshell to finish
-
-    printf '%s' "$opkg_result"
+    printf '%s' "$__result"
 }
 
 # Fetch/merge updates from predefined repository using git.