diff --git a/buildpacks/ruby/src/target_id.rs b/buildpacks/ruby/src/target_id.rs
index 2002812f..4e23a556 100644
--- a/buildpacks/ruby/src/target_id.rs
+++ b/buildpacks/ruby/src/target_id.rs
@@ -16,10 +16,10 @@ const DISTRO_VERSION_STACK: &[(&str, &str, &str)] = &[
 
 #[derive(Debug, thiserror::Error)]
 pub(crate) enum TargetIdError {
-    #[error("Distro name and version '{0}-{1}' is not supported. Must be one of: {}", DISTRO_VERSION_STACK.iter().map(|&(name, version, _)| format!("'{name}-{version}'")).collect::<Vec<_>>().join(", "))]
+    #[error("Distro name and version '{0}-{1}' is not supported. Must be one of: {options}", options = DISTRO_VERSION_STACK.iter().map(|&(name, version, _)| format!("'{name}-{version}'")).collect::<Vec<_>>().join(", "))]
     UnknownDistroNameVersionCombo(String, String),
 
-    #[error("Cannot convert stack name '{0}' into a target OS. Must be one of: {}", DISTRO_VERSION_STACK.iter().map(|&(_, _, stack)| format!("'{stack}'")).collect::<Vec<_>>().join(", "))]
+    #[error("Cannot convert stack name '{0}' into a target OS. Must be one of: {options}", options = DISTRO_VERSION_STACK.iter().map(|&(_, _, stack)| format!("'{stack}'")).collect::<Vec<_>>().join(", "))]
     UnknownStack(String),
 }