diff --git a/Cargo.toml b/Cargo.toml
index b889859..c040fce 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,6 +18,7 @@ crate-type = ["cdylib"]
 [features]
 default = ["with-serde"]
 with-serde = ["protobuf/with-serde"]
+debug-host-behaviour = []
 
 [dependencies]
 proxy-wasm = "0.2.1"
diff --git a/Makefile b/Makefile
index e8c3fe8..4c4d8ef 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,9 @@ MKFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
 PROJECT_PATH := $(patsubst %/,%,$(dir $(MKFILE_PATH)))
 
 BUILD ?= debug
+ifneq ($(FEATURES),)
+	FEATURE_CMD=--features $(FEATURES)
+endif
 
 WASM_RELEASE_BIN = $(PROJECT_PATH)/target/wasm32-unknown-unknown/$(BUILD)/wasm_shim.wasm
 WASM_RELEASE_PATH = $(dir $(WASM_RELEASE_BIN))
@@ -24,9 +27,9 @@ $(PROTOC_BIN):
 build: $(PROTOC_BIN)
 	@echo "Building the wasm filter"
     ifeq ($(BUILD), release)
-		export PATH=$(PROJECT_PATH)/bin:$$PATH; cargo build --target=wasm32-unknown-unknown --release
+		export PATH=$(PROJECT_PATH)/bin:$$PATH; cargo build --target=wasm32-unknown-unknown --release $(FEATURE_CMD)
     else
-		export PATH=$(PROJECT_PATH)/bin:$$PATH; cargo build --target=wasm32-unknown-unknown
+		export PATH=$(PROJECT_PATH)/bin:$$PATH; cargo build --target=wasm32-unknown-unknown $(FEATURE_CMD)
     endif
 
 # Remove old ones and fetch the latest third-party protobufs
diff --git a/README.md b/README.md
index a638a36..640f3f8 100644
--- a/README.md
+++ b/README.md
@@ -176,6 +176,12 @@ Build the WASM module in release mode
 make build BUILD=release
 ```
 
+Build the WASM module with features
+
+```
+make build FEATURES=debug-host-behaviour
+```
+
 ## Testing
 
 ```
diff --git a/src/data/cel.rs b/src/data/cel.rs
index 83f8167..9858640 100644
--- a/src/data/cel.rs
+++ b/src/data/cel.rs
@@ -5,6 +5,7 @@ use cel_interpreter::objects::{Key, Map, ValueType};
 use cel_interpreter::{Context, ExecutionError, ResolveResult, Value};
 use cel_parser::{parse, Expression as CelExpression, Member, ParseError};
 use chrono::{DateTime, FixedOffset};
+#[cfg(feature = "debug-host-behaviour")]
 use log::debug;
 use proxy_wasm::types::{Bytes, Status};
 use serde_json::Value as JsonValue;
@@ -442,7 +443,7 @@ fn properties<'e>(exp: &'e CelExpression, all: &mut Vec<Vec<&'e str>>, path: &mu
     }
 }
 
-#[allow(dead_code)]
+#[cfg(feature = "debug-host-behaviour")]
 pub fn debug_all_well_known_attributes() {
     let attributes = new_well_known_attribute_map();
     attributes.iter().for_each(|(key, value_type)| {
diff --git a/src/data/mod.rs b/src/data/mod.rs
index 004ece6..fc479ae 100644
--- a/src/data/mod.rs
+++ b/src/data/mod.rs
@@ -6,10 +6,11 @@ pub use attribute::get_attribute;
 pub use attribute::store_metadata;
 pub use attribute::AttributeValue;
 
+#[cfg(feature = "debug-host-behaviour")]
+pub use cel::debug_all_well_known_attributes;
+
 pub use cel::Expression;
 pub use cel::Predicate;
 
 pub use property::get_property;
 pub use property::Path as PropertyPath;
-
-// pub use cel::debug_all_well_known_attributes;
diff --git a/src/filter/http_context.rs b/src/filter/http_context.rs
index e7e407f..69a8c0c 100644
--- a/src/filter/http_context.rs
+++ b/src/filter/http_context.rs
@@ -1,5 +1,7 @@
 use crate::configuration::action_set::ActionSet;
 use crate::configuration::{FailureMode, FilterConfig};
+#[cfg(feature = "debug-host-behaviour")]
+use crate::data;
 use crate::operation_dispatcher::{OperationDispatcher, OperationError};
 use crate::service::GrpcService;
 use log::{debug, warn};
@@ -7,7 +9,6 @@ use proxy_wasm::traits::{Context, HttpContext};
 use proxy_wasm::types::Action;
 use std::cell::RefCell;
 use std::rc::Rc;
-// use crate::data;
 
 pub struct Filter {
     pub context_id: u32,
@@ -95,8 +96,8 @@ impl HttpContext for Filter {
     fn on_http_request_headers(&mut self, _: usize, _: bool) -> Action {
         debug!("#{} on_http_request_headers", self.context_id);
 
-        // uncomment to debug log all well known attributes
-        // data::debug_all_well_known_attributes();
+        #[cfg(feature = "debug-host-behaviour")]
+        data::debug_all_well_known_attributes();
 
         match self
             .config