diff --git a/twoliter/Cargo.toml b/twoliter/Cargo.toml
index fa245d5b..d852198a 100644
--- a/twoliter/Cargo.toml
+++ b/twoliter/Cargo.toml
@@ -43,7 +43,7 @@ which.workspace = true
 # Binary dependencies. These are binaries that we want to embed in the Twoliter binary
 buildsys = { workspace = true }
 pipesys = { workspace = true }
-pubsys = { workspace = true }
+pubsys = { workspace = true, optional = true }
 pubsys-setup = { workspace = true }
 testsys = { workspace = true }
 tuftool = { workspace = true }
@@ -58,5 +58,6 @@ tar.workspace = true
 test-case.workspace = true
 
 [features]
-default = ["integ-tests"]
+default = ["integ-tests", "pubsys"]
 integ-tests = []
+pubsys = ["dep:pubsys"]
diff --git a/twoliter/src/tools.rs b/twoliter/src/tools.rs
index 09053db8..b22c8de0 100644
--- a/twoliter/src/tools.rs
+++ b/twoliter/src/tools.rs
@@ -12,6 +12,7 @@ use tracing::debug;
 const TAR_GZ_DATA: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/tools.tar.gz"));
 const BUILDSYS: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_BUILDSYS"));
 const PIPESYS: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_PIPESYS"));
+#[cfg(feature = "pubsys")]
 const PUBSYS: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_PUBSYS"));
 const PUBSYS_SETUP: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_PUBSYS_SETUP"));
 const TESTSYS: &[u8] = include_bytes!(env!("CARGO_BIN_FILE_TESTSYS"));
@@ -44,6 +45,7 @@ pub(crate) async fn install_tools(tools_dir: impl AsRef<Path>) -> Result<()> {
 
     write_bin("buildsys", BUILDSYS, &dir, mtime).await?;
     write_bin("pipesys", PIPESYS, &dir, mtime).await?;
+    #[cfg(feature = "pubsys")]
     write_bin("pubsys", PUBSYS, &dir, mtime).await?;
     write_bin("pubsys-setup", PUBSYS_SETUP, &dir, mtime).await?;
     write_bin("testsys", TESTSYS, &dir, mtime).await?;