5 files changed, 17 insertions, 10 deletions
diff --git a/tvix/eval/src/builtins/mod.rs b/tvix/eval/src/builtins/mod.rs
index 11e0dc8d9fa7..99a63c97998d 100644
--- a/tvix/eval/src/builtins/mod.rs
+++ b/tvix/eval/src/builtins/mod.rs
@@ -44,7 +44,7 @@ fn pure_builtins() -> Vec<Builtin> {
         }),
         Builtin::new("isFunction", 1, |args| {
             Ok(Value::Bool(match args[0] {
-                Value::Lambda(_) => true,
+                Value::Closure(_) => true,
                 Value::Builtin(_) => true,
                 _ => false,
             }))
diff --git a/tvix/eval/src/compiler/mod.rs b/tvix/eval/src/compiler/mod.rs
index 5cb02a66b96a..3160c68c6e3c 100644
--- a/tvix/eval/src/compiler/mod.rs
+++ b/tvix/eval/src/compiler/mod.rs
@@ -23,7 +23,7 @@ use std::rc::Rc;
 use crate::chunk::Chunk;
 use crate::errors::{Error, ErrorKind, EvalResult};
 use crate::opcode::{CodeIdx, OpCode};
-use crate::value::{Lambda, Value};
+use crate::value::{Closure, Lambda, Value};
 use crate::warnings::{EvalWarning, WarningKind};
 
 /// Represents the result of compiling a piece of Nix code. If
@@ -822,7 +822,9 @@ impl Compiler {
             crate::disassembler::disassemble_chunk(&compiled.lambda.chunk);
         }
 
-        self.emit_constant(Value::Lambda(compiled.lambda));
+        self.emit_constant(Value::Closure(Closure {
+            lambda: compiled.lambda,
+        }));
     }
 
     fn compile_apply(&mut self, node: ast::Apply) {
diff --git a/tvix/eval/src/value/lambda.rs b/tvix/eval/src/value/function.rs
index d8609f50f367..45efc24f09f8 100644
--- a/tvix/eval/src/value/lambda.rs
+++ b/tvix/eval/src/value/function.rs
@@ -21,3 +21,8 @@ impl Lambda {
         &mut self.chunk
     }
 }
+
+#[derive(Clone, Debug)]
+pub struct Closure {
+    pub lambda: Lambda,
+}
diff --git a/tvix/eval/src/value/mod.rs b/tvix/eval/src/value/mod.rs
index bf07c5d326d0..6bd1efde52ff 100644
--- a/tvix/eval/src/value/mod.rs
+++ b/tvix/eval/src/value/mod.rs
@@ -5,14 +5,14 @@ use std::{fmt::Display, path::PathBuf};
 
 mod attrs;
 mod builtin;
-mod lambda;
+mod function;
 mod list;
 mod string;
 
 use crate::errors::{ErrorKind, EvalResult};
 pub use attrs::NixAttrs;
 pub use builtin::Builtin;
-pub use lambda::Lambda;
+pub use function::{Closure, Lambda};
 pub use list::NixList;
 pub use string::NixString;
 
@@ -27,7 +27,7 @@ pub enum Value {
     Path(PathBuf),
     Attrs(Rc<NixAttrs>),
     List(NixList),
-    Lambda(Lambda),
+    Closure(Closure),
     Builtin(Builtin),
 
     // Internal values that, while they technically exist at runtime,
@@ -52,7 +52,7 @@ impl Value {
             Value::Path(_) => "path",
             Value::Attrs(_) => "set",
             Value::List(_) => "list",
-            Value::Lambda(_) | Value::Builtin(_) => "lambda",
+            Value::Closure(_) | Value::Builtin(_) => "lambda",
 
             // Internal types
             Value::AttrPath(_) | Value::Blackhole | Value::NotFound => "internal",
@@ -130,7 +130,7 @@ impl Display for Value {
             Value::Path(p) => p.display().fmt(f),
             Value::Attrs(attrs) => attrs.fmt(f),
             Value::List(list) => list.fmt(f),
-            Value::Lambda(_) => f.write_str("lambda"), // TODO: print position
+            Value::Closure(_) => f.write_str("lambda"), // TODO: print position
             Value::Builtin(builtin) => builtin.fmt(f),
 
             // Nix prints floats with a maximum precision of 5 digits
diff --git a/tvix/eval/src/vm.rs b/tvix/eval/src/vm.rs
index 1e39792cd56f..6a7ebd5e64d2 100644
--- a/tvix/eval/src/vm.rs
+++ b/tvix/eval/src/vm.rs
@@ -7,7 +7,7 @@ use crate::{
     chunk::Chunk,
     errors::{ErrorKind, EvalResult},
     opcode::OpCode,
-    value::{Lambda, NixAttrs, NixList, Value},
+    value::{Closure, Lambda, NixAttrs, NixList, Value},
 };
 
 #[cfg(feature = "disassembler")]
@@ -357,7 +357,7 @@ impl VM {
                 OpCode::OpCall => {
                     let callable = self.pop();
                     match callable {
-                        Value::Lambda(lambda) => self.call(lambda, 1),
+                        Value::Closure(Closure { lambda }) => self.call(lambda, 1),
                         Value::Builtin(builtin) => {
                             let arg = self.pop();
                             let result = builtin.apply(arg)?;