diff --git a/crates/clusterflux-coordinator/src/main.rs b/crates/clusterflux-coordinator/src/main.rs
index 8c9ce7d..8344f5f 100644
--- a/crates/clusterflux-coordinator/src/main.rs
+++ b/crates/clusterflux-coordinator/src/main.rs
@@ -5,17 +5,40 @@ use clusterflux_core::{ProjectId, TenantId, UserId};
 use serde_json::json;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let raw_args = std::env::args().skip(1).collect::<Vec<_>>();
+    match raw_args.as_slice() {
+        [flag] if matches!(flag.as_str(), "--version" | "-V") => {
+            println!("clusterflux-coordinator {}", env!("CARGO_PKG_VERSION"));
+            return Ok(());
+        }
+        [flag] if matches!(flag.as_str(), "--help" | "-h") => {
+            println!(
+                "Clusterflux coordinator.\n\n\
+                 Usage: clusterflux-coordinator [OPTIONS]\n\n\
+                 Options:\n  \
+                   --listen <ADDRESS>                 [default: 127.0.0.1:0]\n  \
+                   --allow-local-trusted-loopback\n  \
+                   -h, --help\n  \
+                   -V, --version"
+            );
+            return Ok(());
+        }
+        _ => {}
+    }
+
     let mut listen = "127.0.0.1:0".to_owned();
     let mut allow_local_trusted = std::env::var("CLUSTERFLUX_ALLOW_LOCAL_TRUSTED_LOOPBACK")
         .ok()
         .as_deref()
         == Some("1");
-    let mut args = std::env::args().skip(1);
+    let mut args = raw_args.into_iter();
     while let Some(arg) = args.next() {
         if arg == "--listen" {
             listen = args.next().ok_or("--listen requires an address")?;
         } else if arg == "--allow-local-trusted-loopback" {
             allow_local_trusted = true;
+        } else {
+            return Err(format!("unknown argument: {arg}").into());
         }
     }
 
diff --git a/crates/clusterflux-dap/src/main.rs b/crates/clusterflux-dap/src/main.rs
index 5e02bcd..b0a9c14 100644
--- a/crates/clusterflux-dap/src/main.rs
+++ b/crates/clusterflux-dap/src/main.rs
@@ -36,6 +36,26 @@ use demo_backend::{LINUX_THREAD, MAIN_THREAD, PACKAGE_THREAD, WINDOWS_THREAD};
 use virtual_model::{process_id, RuntimeBackend};
 
 fn main() -> Result<()> {
+    let raw_args = std::env::args().skip(1).collect::<Vec<_>>();
+    match raw_args.as_slice() {
+        [flag] if matches!(flag.as_str(), "--version" | "-V") => {
+            println!("clusterflux-debug-dap {}", env!("CARGO_PKG_VERSION"));
+            return Ok(());
+        }
+        [flag] if matches!(flag.as_str(), "--help" | "-h") => {
+            println!(
+                "Clusterflux Debug Adapter Protocol server.\n\n\
+                 Usage: clusterflux-debug-dap\n\n\
+                 The adapter communicates over standard input and output.\n\n\
+                 Options:\n  \
+                   -h, --help\n  \
+                   -V, --version"
+            );
+            return Ok(());
+        }
+        [] => {}
+        [argument, ..] => anyhow::bail!("unknown argument: {argument}"),
+    }
     adapter::run_adapter()
 }
 
diff --git a/crates/clusterflux-node/src/main.rs b/crates/clusterflux-node/src/main.rs
index 8f2960b..2ada582 100644
--- a/crates/clusterflux-node/src/main.rs
+++ b/crates/clusterflux-node/src/main.rs
@@ -8,5 +8,34 @@ mod task_artifacts;
 mod task_reports;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let raw_args = std::env::args().skip(1).collect::<Vec<_>>();
+    match raw_args.as_slice() {
+        [flag] if matches!(flag.as_str(), "--version" | "-V") => {
+            println!("clusterflux-node {}", env!("CARGO_PKG_VERSION"));
+            return Ok(());
+        }
+        [flag] if matches!(flag.as_str(), "--help" | "-h") => {
+            println!(
+                "Clusterflux node worker.\n\n\
+                 Usage: clusterflux-node --coordinator <URL> [OPTIONS]\n\n\
+                 Options:\n  \
+                   --coordinator <URL>\n  \
+                   --tenant <TENANT>                   [default: tenant]\n  \
+                   --project-id <PROJECT>              [default: project]\n  \
+                   --node <NODE>                       [default: node]\n  \
+                   --project-root <PATH>\n  \
+                   --enrollment-grant <GRANT>\n  \
+                   --public-key <KEY>\n  \
+                   --worker\n  \
+                   --emit-ready\n  \
+                   --control-poll-ms <MILLISECONDS>\n  \
+                   --assignment-poll-ms <MILLISECONDS> [default: 500]\n  \
+                   -h, --help\n  \
+                   -V, --version"
+            );
+            return Ok(());
+        }
+        _ => {}
+    }
     daemon::run()
 }
diff --git a/packages.nix b/packages.nix
index ed60115..1305b67 100644
--- a/packages.nix
+++ b/packages.nix
@@ -37,6 +37,15 @@ let
       test -x "$out/bin/clusterflux-node"
       test -x "$out/bin/clusterflux-coordinator"
       test -x "$out/bin/clusterflux-debug-dap"
+      for command in \
+        clusterflux \
+        clusterflux-node \
+        clusterflux-coordinator \
+        clusterflux-debug-dap
+      do
+        ${pkgs.coreutils}/bin/timeout 5 "$out/bin/$command" --version >/dev/null
+        ${pkgs.coreutils}/bin/timeout 5 "$out/bin/$command" --help >/dev/null
+      done
     '';
     postFixup =
       let