diff --git a/hydroflow/Cargo.toml b/hydroflow/Cargo.toml
index 722ee0032a71..c3d391ac6927 100644
--- a/hydroflow/Cargo.toml
+++ b/hydroflow/Cargo.toml
@@ -60,6 +60,10 @@ tokio-util = { version = "0.7.4", features = [ "net", "codec" ] }
 variadics = { path = "../variadics" }
 rustc-hash = "1.1.0"
 
+# Diagnostics feature does not work on wasm32.
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+hydroflow_lang = { path = "../hydroflow_lang", features = ["diagnostics"] }
+
 [dev-dependencies]
 chrono = { version = "0.4.20", features = [ "serde" ], default-features = false }
 clap = { version = "4.0.29", features = [ "derive" ] }
diff --git a/hydroflow_datalog/Cargo.toml b/hydroflow_datalog/Cargo.toml
index 7695693a0a4c..2bcaae18244f 100644
--- a/hydroflow_datalog/Cargo.toml
+++ b/hydroflow_datalog/Cargo.toml
@@ -13,3 +13,7 @@ syn = { version = "1.0.0", features = [ "parsing", "extra-traits" ] }
 proc-macro2 = "1.0.27"
 proc-macro-crate = "1.1.0"
 hydroflow_datalog_core = { path = "../hydroflow_datalog_core" }
+
+# Diagnostics feature does not work on wasm32.
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+hydroflow_datalog_core = { path = "../hydroflow_datalog_core", features = ["diagnostics" ] }
diff --git a/hydroflow_datalog_core/Cargo.toml b/hydroflow_datalog_core/Cargo.toml
index 109102d96516..a6dde58859ae 100644
--- a/hydroflow_datalog_core/Cargo.toml
+++ b/hydroflow_datalog_core/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 path = "src/lib.rs"
 
 [features]
-default = [ "diagnostics" ]
+default = []
 diagnostics = [ "hydroflow_lang/diagnostics" ]
 
 [dependencies]
@@ -17,7 +17,7 @@ syn = { version = "1.0.0", features = [ "parsing", "extra-traits" ] }
 proc-macro2 = "1.0.27"
 proc-macro-crate = "1.1.0"
 rust-sitter = "0.2.1"
-hydroflow_lang = { path = "../hydroflow_lang", default-features = false }
+hydroflow_lang = { path = "../hydroflow_lang" }
 
 [build-dependencies]
 rust-sitter-tool = "0.2.1"
diff --git a/hydroflow_lang/Cargo.toml b/hydroflow_lang/Cargo.toml
index 24b57832c612..d4ff6de86360 100644
--- a/hydroflow_lang/Cargo.toml
+++ b/hydroflow_lang/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [features]
-default = [ "diagnostics" ]
+default = []
 diagnostics = []
 
 [dependencies]