diff --git a/wdl/Cargo.toml b/wdl/Cargo.toml
index 2119ed92f..1cb7db5c9 100644
--- a/wdl/Cargo.toml
+++ b/wdl/Cargo.toml
@@ -18,7 +18,8 @@ wdl-lint = { path = "../wdl-lint", version = "0.8.0", optional = true }
 wdl-analysis = { path = "../wdl-analysis", version = "0.5.0", optional = true }
 wdl-lsp = { path = "../wdl-lsp", version = "0.5.0", optional = true }
 wdl-format = { path = "../wdl-format", version = "0.3.0", optional = true }
-wdl-engine = { path = "../wdl-engine", version = "0.0.0", optional = true }
+# TODO: uncomment this when `wdl-engine` is ready for release
+#wdl-engine = { path = "../wdl-engine", version = "0.0.0", optional = true }
 tracing-subscriber = { workspace = true, optional = true }
 clap = { workspace = true, optional = true }
 anyhow = { workspace = true, optional = true }
@@ -36,14 +37,15 @@ anyhow = { workspace = true }
 codespan-reporting = { workspace = true }
 
 [features]
-default = ["ast", "grammar", "lint", "format", "engine"]
+default = ["ast", "grammar", "lint", "format"]
 analysis = ["dep:wdl-analysis"]
 ast = ["dep:wdl-ast"]
 format = ["dep:wdl-format"]
 grammar = ["dep:wdl-grammar"]
 lint = ["dep:wdl-lint"]
 lsp = ["dep:wdl-lsp"]
-engine = ["dep:wdl-engine"]
+# TOOD: uncomment this when `wdl-engine` is ready for release.
+#engine = ["dep:wdl-engine"]
 codespan = ["ast", "wdl-ast/codespan", "dep:codespan-reporting"]
 cli = [
     "analysis",
diff --git a/wdl/src/lib.rs b/wdl/src/lib.rs
index eab6ab46f..f8a278ee8 100644
--- a/wdl/src/lib.rs
+++ b/wdl/src/lib.rs
@@ -78,9 +78,10 @@ pub use wdl_analysis as analysis;
 #[cfg(feature = "ast")]
 #[doc(inline)]
 pub use wdl_ast as ast;
-#[cfg(feature = "engine")]
-#[doc(inline)]
-pub use wdl_engine as engine;
+// TODO: uncomment this when wdl-engine is ready for release.
+// #[cfg(feature = "engine")]
+// #[doc(inline)]
+// pub use wdl_engine as engine;
 #[cfg(feature = "format")]
 #[doc(inline)]
 pub use wdl_format as format;