diff --git a/src/libboard_artiq/src/drtioaux.rs b/src/libboard_artiq/src/drtioaux.rs
index 8570621..d43f692 100644
--- a/src/libboard_artiq/src/drtioaux.rs
+++ b/src/libboard_artiq/src/drtioaux.rs
@@ -5,10 +5,10 @@ use crc;
 use io::{ProtoRead, ProtoWrite, Cursor, Error as IoError};
 use mem::mem::DRTIOAUX_MEM;
 use pl::csr::DRTIOAUX;
-use crate::drtioaux_proto::Error as ProtocolError;
+use drtioaux_proto::Error as ProtocolError;
 use libboard_zynq::{timer::GlobalTimer, time::Milliseconds};
 
-pub use crate::drtioaux_proto::Packet;
+pub use drtioaux_proto::Packet;
 
 // this is parametric over T because there's no impl Fail for !.
 #[derive(Debug)]
diff --git a/src/libboard_artiq/src/drtioaux_proto.rs b/src/libboard_artiq/src/drtioaux_proto.rs
index bd48756..9dba05c 100644
--- a/src/libboard_artiq/src/drtioaux_proto.rs
+++ b/src/libboard_artiq/src/drtioaux_proto.rs
@@ -1,11 +1,9 @@
 use io::{Read, ProtoRead, Write, ProtoWrite, Error as IoError};
 
-#[derive(Fail, Debug)]
+#[derive(Debug)]
 pub enum Error<T> {
-    #[fail(display = "unknown packet {:#02x}", _0)]
     UnknownPacket(u8),
-    #[fail(display = "{}", _0)]
-    Io(#[cause] IoError<T>)
+    Io(IoError<T>)
 }
 
 impl<T> From<IoError<T>> for Error<T> {
diff --git a/src/libboard_artiq/src/lib.rs b/src/libboard_artiq/src/lib.rs
index 764af64..c9217af 100644
--- a/src/libboard_artiq/src/lib.rs
+++ b/src/libboard_artiq/src/lib.rs
@@ -15,6 +15,8 @@ extern crate io;
 #[path = "../../../build/pl.rs"]
 pub mod pl;
 
+pub mod drtioaux_proto;
+
 #[cfg(has_drtio)]
 pub mod drtioaux;
 // for now, memory map is only needed for DRTIO firmware