f793baf370bdfcbe3004f7746f3c945feefb56c8

 1diff --git a/plugins/jsontools/jsontools.plugin.zsh b/plugins/jsontools/jsontools.plugin.zsh
 2index ed45cfa8ebcd10389878c5a8355a44b6cf60b24f..857ca0ec9946a061c3c4f5fe9a94b03ea3223e32 100644
 3--- a/plugins/jsontools/jsontools.plugin.zsh
 4+++ b/plugins/jsontools/jsontools.plugin.zsh
 5@@ -7,7 +7,7 @@ if [[ -n "$JSONTOOLS_METHOD" ]]; then
 6 fi
 7 
 8 # If method undefined, find the first one that is installed
 9-if [[ ! -v JSONTOOLS_METHOD ]]; then
10+if [[ -z "$JSONTOOLS_METHOD" ]]; then
11   for JSONTOOLS_METHOD in node python ruby; do
12     # If method found, break out of loop
13     (( $+commands[$JSONTOOLS_METHOD] )) && break
14@@ -16,7 +16,7 @@ if [[ ! -v JSONTOOLS_METHOD ]]; then
15   done
16 
17   # If no methods were found, exit the plugin
18-  [[ -v JSONTOOLS_METHOD ]] || return 1
19+  [[ -n "$JSONTOOLS_METHOD" ]] || return 1
20 fi
21 
22 # Define json tools for each method