Value not populated for given string in scala spark

Question

I am using property file to pass sql query in spark scala, my property file like this.

spark.query=select '$env' from table_name limit 5

In spark code

val env="dev"
val query=sparkContext.getConf.get("spark.query");

println(query);

spark.sql(s"""$query""");

But here it's not talking value for dev my output is like below:

select $env from table_name =>$env value not populating.