diff --git a/crates/steel-core/src/compiler/modules.rs b/crates/steel-core/src/compiler/modules.rs
index 095d6dbf5..80117dae9 100644
--- a/crates/steel-core/src/compiler/modules.rs
+++ b/crates/steel-core/src/compiler/modules.rs
@@ -497,6 +497,8 @@ impl ModuleManager {
 
                             // TODO: If there is a prefix applied, use it here?
                             if let Some(prefix) = &require_object.prefix {
+                                // println!("Found prefix: {}", prefix);
+
                                 if let Some(existing) = owned_provide.atom_identifier_mut() {
                                     let mut prefixed_identifier = prefix.clone();
                                     prefixed_identifier.push_str(existing.resolve());
@@ -512,6 +514,8 @@ impl ModuleManager {
                                 SyntaxObject::default(TokenType::Define),
                             )));
 
+                            // println!("{}", define);
+
                             require_defines.push(define);
                         }
                         _ => {
@@ -1120,6 +1124,7 @@ impl CompiledModule {
 
                             // Mangle with a prefix if necessary
                             let mut provide = provide.clone();
+                            let mut raw_provide = provide.clone();
 
                             // If we have the alias listed, we should use it
                             if !explicit_requires.is_empty() {
@@ -1155,13 +1160,17 @@ impl CompiledModule {
                                     ExprKind::ident("%proto-hash-get%"),
                                     ExprKind::atom("__module-".to_string() + &other_module_prefix),
                                     ExprKind::Quote(Box::new(Quote::new(
-                                        provide.clone(),
+                                        raw_provide.clone(),
                                         SyntaxObject::default(TokenType::Quote)
                                     )))
                                 ],
                                 SyntaxObject::default(TokenType::Define),
                             )));
 
+                            // if require_object.prefix.is_some() {
+                            //     println!("{}", define);
+                            // }
+
                             provide_definitions.push(define);
                         }
                         _ => {
diff --git a/crates/steel-core/src/primitives/hashmaps.rs b/crates/steel-core/src/primitives/hashmaps.rs
index f92252b1e..7cfde8ff9 100644
--- a/crates/steel-core/src/primitives/hashmaps.rs
+++ b/crates/steel-core/src/primitives/hashmaps.rs
@@ -154,7 +154,7 @@ pub fn hash_ref(map: &Gc<HashMap<SteelVal, SteelVal>>, key: &SteelVal) -> Result
     if key.is_hashable() {
         match map.get(key) {
             Some(value) => Ok(value.clone()),
-            None => stop!(Generic => "key not found in hash map: {}", key),
+            None => stop!(Generic => "key not found in hash map: {} - map: {:?}", key, map),
         }
     } else {
         stop!(TypeMismatch => "key not hashable: {}", key)
diff --git a/crates/steel-core/src/steel_vm/engine.rs b/crates/steel-core/src/steel_vm/engine.rs
index d287cff9d..f26d3dc00 100644
--- a/crates/steel-core/src/steel_vm/engine.rs
+++ b/crates/steel-core/src/steel_vm/engine.rs
@@ -1029,11 +1029,11 @@ impl Engine {
         self.with_mut_reference(obj).consume(|engine, args| {
             let mut args = args.into_iter();
 
-            engine.register_value(bind_to, args.next().unwrap());
+            engine.update_value(bind_to, args.next().unwrap());
 
             let res = engine.compile_and_run_raw_program(script);
 
-            engine.register_value(bind_to, SteelVal::Void);
+            engine.update_value(bind_to, SteelVal::Void);
 
             res.map(|x| x.into_iter().next().unwrap())
         })
@@ -1057,11 +1057,11 @@ impl Engine {
         self.with_mut_reference(obj).consume(move |engine, args| {
             let mut args = args.into_iter();
 
-            engine.register_value(bind_to, args.next().unwrap());
+            engine.update_value(bind_to, args.next().unwrap());
 
             let res = engine.compile_and_run_raw_program_with_path(script, path.clone());
 
-            engine.register_value(bind_to, SteelVal::Void);
+            engine.update_value(bind_to, SteelVal::Void);
 
             res.map(|x| x.into_iter().next().unwrap())
         })
@@ -1573,6 +1573,12 @@ impl Engine {
         // self
     }
 
+    pub fn update_value(&mut self, name: &str, value: SteelVal) -> Option<&mut Self> {
+        let idx = self.compiler.get_idx(name)?;
+        self.virtual_machine.global_env.repl_set_idx(idx, value);
+        Some(self)
+    }
+
     /// Registers multiple values at once
     pub fn register_values(
         &mut self,
@@ -2092,6 +2098,7 @@ mod engine_api_tests {
         let mut engine = Engine::new();
         let mut external_object = ReferenceStruct { value: 10 };
 
+        engine.register_value("*external*", SteelVal::Void);
         engine.register_fn("external-get-value", ReferenceStruct::get_value);
 
         {
@@ -2112,6 +2119,7 @@ mod engine_api_tests {
         let mut engine = Engine::new();
         let mut external_object = ReferenceStruct { value: 10 };
 
+        engine.register_value("*external*", SteelVal::Void);
         engine.register_fn("external-get-value", ReferenceStruct::get_value);
 
         let res = engine