diff --git a/crates/lyrebird/src/main.rs b/crates/lyrebird/src/main.rs
index 62480c4..b9a4b35 100644
--- a/crates/lyrebird/src/main.rs
+++ b/crates/lyrebird/src/main.rs
@@ -176,7 +176,7 @@ fn resolve_target_addr(addr: &TargetAddr) -> Result<SocketAddr> {
         TargetAddr::Ip(sa) => Ok(*sa),
         TargetAddr::Domain(_, _) => {
             // this will always fail because ptrs does not do dns lookups.
-            ptrs::resolve_addr(format!("{addr}")).context("domain resolution failed")
+            ptrs::tor::resolve_addr(format!("{addr}")).context("domain resolution failed")
         }
     }
 }
@@ -189,7 +189,7 @@ async fn main() -> Result<()> {
     let args = Args::parse();
 
     // Make state directory
-    let statedir = ptrs::make_state_dir()?;
+    let statedir = ptrs::tor::make_state_dir()?;
 
     // launch tracing subscriber with filter level
     init_logging_recvr(
@@ -202,7 +202,7 @@ async fn main() -> Result<()> {
     let cancel_token = tokio_util::sync::CancellationToken::new();
 
     // launch runners
-    let mut exit_rx = if ptrs::is_client()? {
+    let mut exit_rx = if ptrs::tor::is_client()? {
         // running as CLIENT
         client_setup(&statedir, cancel_token.clone()).await?
     } else {
@@ -256,7 +256,7 @@ async fn client_setup(
     cancel_token: CancellationToken,
 ) -> Result<oneshot::Receiver<bool>> {
     let obfs4_name = Obfs4PT::name();
-    let client_pt_info = ptrs::ClientInfo::new()?;
+    let client_pt_info = ptrs::tor::ClientInfo::new()?;
     let proxy_uri = client_pt_info.uri.ok_or(BridgeLineParseError)?;
     let (tx, rx) = oneshot::channel::<bool>();
 
@@ -514,7 +514,7 @@ async fn server_setup(
 ) -> Result<oneshot::Receiver<bool>> {
     let obfs4_name = Obfs4PT::name();
 
-    let server_info = ptrs::ServerInfo::new()?;
+    let server_info = ptrs::tor::ServerInfo::new()?;
     let (tx, rx) = oneshot::channel::<bool>();
 
     let mut listeners = Vec::new();
diff --git a/crates/ptrs/Cargo.toml b/crates/ptrs/Cargo.toml
index aabef24..6d7bc62 100644
--- a/crates/ptrs/Cargo.toml
+++ b/crates/ptrs/Cargo.toml
@@ -12,8 +12,10 @@ repository = "https://github.com/jmwample/ptrs"
 
 
 [features]
-default = []
+default = ["tor", "water"]
 debug = []
+tor = []
+water = []
 
 [lib]
 name = "ptrs"
diff --git a/crates/ptrs/src/lib.rs b/crates/ptrs/src/lib.rs
index e80cee8..cb9bf3d 100644
--- a/crates/ptrs/src/lib.rs
+++ b/crates/ptrs/src/lib.rs
@@ -11,12 +11,14 @@ use tokio::io::{AsyncRead, AsyncWrite};
 
 mod error;
 pub use error::Error;
-#[macro_use]
-pub mod args;
-mod helpers;
-pub use helpers::*;
 mod log;
-pub mod orport;
+
+#[cfg(feature = "tor")]
+pub mod tor;
+pub use tor::args;
+
+#[cfg(feature = "water")]
+pub mod water;
 
 pub trait PluggableTransport<InRW>
 where
diff --git a/crates/ptrs/src/tor.rs b/crates/ptrs/src/tor.rs
new file mode 100644
index 0000000..1427a4b
--- /dev/null
+++ b/crates/ptrs/src/tor.rs
@@ -0,0 +1,8 @@
+//! Tor Pluggable Transport integration tools
+
+#[macro_use]
+pub mod args;
+mod helpers;
+pub use helpers::*;
+
+pub mod orport;
diff --git a/crates/ptrs/src/args.rs b/crates/ptrs/src/tor/args.rs
similarity index 100%
rename from crates/ptrs/src/args.rs
rename to crates/ptrs/src/tor/args.rs
diff --git a/crates/ptrs/src/helpers.rs b/crates/ptrs/src/tor/helpers.rs
similarity index 100%
rename from crates/ptrs/src/helpers.rs
rename to crates/ptrs/src/tor/helpers.rs
diff --git a/crates/ptrs/src/orport.rs b/crates/ptrs/src/tor/orport.rs
similarity index 100%
rename from crates/ptrs/src/orport.rs
rename to crates/ptrs/src/tor/orport.rs
diff --git a/crates/ptrs/src/water.rs b/crates/ptrs/src/water.rs
new file mode 100644
index 0000000..8f32344
--- /dev/null
+++ b/crates/ptrs/src/water.rs
@@ -0,0 +1,4 @@
+/// This trait allows for conversion to a format that can be compiled into a WATER binary.
+pub trait Soluble {}
+
+// impl<I> Soluble for Box<dyn ClientBuilder<I>> {}