diff --git a/Cargo.lock b/Cargo.lock
index a8b258b..0e92fd2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -166,7 +166,7 @@ dependencies = [
 
 [[package]]
 name = "core"
-version = "0.1.1"
+version = "0.1.2"
 dependencies = [
  "anyhow",
  "derive_more",
diff --git a/crates/core/Cargo.toml b/crates/core/Cargo.toml
index c3b39fc..d215fe3 100644
--- a/crates/core/Cargo.toml
+++ b/crates/core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "core"
-version = "0.1.1"
+version = "0.1.2"
 edition.workspace = true
 license.workspace = true
 
diff --git a/crates/core/src/error.rs b/crates/core/src/error.rs
index 521ebfe..da6f2d3 100644
--- a/crates/core/src/error.rs
+++ b/crates/core/src/error.rs
@@ -18,5 +18,7 @@ pub enum Error {
     #[from]
     TomlSerialize(toml::ser::Error),
 
+    UndefinedEntryPoint,
+
     UnknownPackage,
 }
diff --git a/crates/core/src/workspace.rs b/crates/core/src/workspace.rs
index 81e6267..f74621d 100644
--- a/crates/core/src/workspace.rs
+++ b/crates/core/src/workspace.rs
@@ -158,6 +158,10 @@ impl WorkspaceHandler {
                 .entry_point();
         }
 
+        if entry_point.file_name().is_none() {
+            return Err(Error::UndefinedEntryPoint);
+        }
+
         java::runtime::JVMBuilder::new(Self::DIR_TARGET)
             .assertions(assertions)
             .monitor(true)