diff --git a/src/config_file.rs b/src/config_file.rs
index 014d6cb..7475f1b 100644
--- a/src/config_file.rs
+++ b/src/config_file.rs
@@ -49,6 +49,7 @@ pub(crate) enum EnvVariableOption {
 pub(crate) enum EnvVariableValue {
     String(String),
     Array(Vec<String>),
+    Set(bool),
 }
 
 #[cfg(test)]
diff --git a/src/main.rs b/src/main.rs
index 4064b84..f48ac69 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -233,6 +233,8 @@ fn to_shell_source(vars: &EnvironmentVariables, shell: &Shell) -> String {
         // Any arrays are treated as a path.
         let (value, is_path) = match raw_value {
             EnvVariableValue::String(string) => (expand_value(string.as_str()), false),
+            EnvVariableValue::Set(true) => ("1".to_string(), false),
+            EnvVariableValue::Set(false) => continue, // todo!
             EnvVariableValue::Array(array) => {
                 let v_expanded: Vec<String> =
                     array.iter().map(|value| expand_value(value)).collect();