You can try the following:

Option-1).  Passing custom system properties using -D option

./jboss-cli.sh -c -Daaa.bbb=ccc  -DWILDFLY_HOME=/PATH/TO/wildfly-10.0.0.CR3-SNAPSHOT

[standalone@localhost:9990 /] echo ${WILDFLY_HOME}
/Users/jsensharma/NotBackedUp/Installed/wildfly-10.0.0.CR3-SNAPSHOT

[standalone@localhost:9990 /] echo ${aaa.bbb}
ccc


[standalone@localhost:9990 /] echo ${user.dir}
/PATH/TO/wildfly-10.0.0.CR3-SNAPSHOT/bin

[standalone@localhost:9990 /] echo ${user.name}
jsensharma

But in order to do that you will need to edit the following file "$JBOSS_HOME/bin/jboss-cli.xml" and will need to ser the following property to "true"  (by default that is false)

    <!-- whether to resolve system properties specified as command argument or operation parameter values
                  in the CLI VM before sending the operation requests to the controller -->
    <resolve-parameter-values>true</resolve-parameter-values>

Option-2)  Write your own Bat file which will first set some variables by reading the Environment values and in the same BAT file invoke the jboss-cli.cmd script by passing those values.

set wildfly_home=%WILDFLY_HOME%_set aaa.bbb=ccc
set MY_STUFF=C:\somedir\containing\the\jars

%WILDFLY_HOME%\bin\jboss-cli.cmd -c
batch
echo ${wildfly_home}
module add --name=com.mysql.driver --dependencies=javax.api,javax.transaction.api --resources=${MY_STUFF}\mysql-connector-java-5.1.35.jar
/////// Write further commands here......
run-batch
exit

Additionally you can also have a look at the :  Command line environment variables   which explains how to declare custom variables while using jboss-cli and how to use the.     Also how to pass properties file containing some pre defined properties using "--properties" as described in :

Regards

Jay SenSharma

to access environment variables, as you want to.

proper syntax would be ${env.WILDFLY_HOME} in your case.

so just prefix it with env., without that it looks for system properties as Jay noted above.

Which version of WildFLy are you using?  is it WildFly 8 ?

I tried it on WildFly 9 and Wildfly 10 as following and it works:

[disconnected /] echo ${env.JBOSS_HOME}
/Users/jsensharma/NotBackedUp/Installed/wildfly-9.0.1.Final

AND

[disconnected /] echo ${env.JBOSS_HOME}
/Users/jsensharma/NotBackedUp/Installed/wildfly-10.0.0.CR3-SNAPSHOT

NOTE: But in order to do that you will need to edit the following file "$JBOSS_HOME/bin/jboss-cli.xml" and will need to ser the following property to "true"  (by default that is false)

    <!-- whether to resolve system properties specified as command argument or operation parameter values 
                  in the CLI VM before sending the operation requests to the controller --> 
    <resolve-parameter-values>true</resolve-parameter-values>