diff --git a/Cargo.toml b/Cargo.toml
index f8d722ce..5a21ff77 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,7 +30,6 @@ rustc_version = "0.2"
 [dependencies]
 chrono = "0.4"
 failure = "0.1.1"
-failure_derive = "0.1.1"
 lazy_static = "0.2"
 time = "0.1"
 uuid = { version = "0.5", features = ["v4", "serde"] }
@@ -82,6 +81,9 @@ path = "query-sql"
 [dependencies.sql_traits]
 path = "sql-traits"
 
+[dependencies.public_traits]
+path = "public-traits"
+
 [dependencies.mentat_tolstoy]
 path = "tolstoy"
 optional = true
diff --git a/public-traits/Cargo.toml b/public-traits/Cargo.toml
new file mode 100644
index 00000000..260add5f
--- /dev/null
+++ b/public-traits/Cargo.toml
@@ -0,0 +1,45 @@
+[package]
+name = "public_traits"
+version = "0.0.1"
+workspace = ".."
+
+[lib]
+name = "public_traits"
+path = "lib.rs"
+
+[features]
+default = ["syncable"]
+syncable = ["tolstoy_traits"]
+
+[dependencies]
+failure = "0.1.1"
+failure_derive = "0.1.1"
+
+[dependencies.rusqlite]
+version = "0.13"
+features = ["limits"]
+
+[dependencies.edn]
+path = "../edn"
+
+[dependencies.core_traits]
+path = "../core-traits"
+
+[dependencies.db_traits]
+path = "../db-traits"
+
+[dependencies.query_algebrizer_traits]
+path = "../query-algebrizer-traits"
+
+[dependencies.query_projector_traits]
+path = "../query-projector-traits"
+
+[dependencies.query_pull_traits]
+path = "../query-pull-traits"
+
+[dependencies.sql_traits]
+path = "../sql-traits"
+
+[dependencies.tolstoy_traits]
+path = "../tolstoy-traits"
+optional = true
diff --git a/src/errors.rs b/public-traits/errors.rs
similarity index 100%
rename from src/errors.rs
rename to public-traits/errors.rs
diff --git a/public-traits/lib.rs b/public-traits/lib.rs
new file mode 100644
index 00000000..7cba001f
--- /dev/null
+++ b/public-traits/lib.rs
@@ -0,0 +1,26 @@
+// Copyright 2018 Mozilla
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+// this file except in compliance with the License. You may obtain a copy of the
+// License at http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+extern crate failure;
+#[macro_use]
+extern crate failure_derive;
+
+extern crate rusqlite;
+
+extern crate edn;
+extern crate core_traits;
+extern crate db_traits;
+extern crate query_pull_traits;
+extern crate query_projector_traits;
+extern crate query_algebrizer_traits;
+extern crate tolstoy_traits;
+extern crate sql_traits;
+
+pub mod errors;
diff --git a/src/conn.rs b/src/conn.rs
index 65ab8e65..dde86076 100644
--- a/src/conn.rs
+++ b/src/conn.rs
@@ -97,7 +97,7 @@ use entity_builder::{
     TermBuilder,
 };
 
-use errors::{
+use public_traits::errors::{
     Result,
     MentatError,
 };
diff --git a/src/entity_builder.rs b/src/entity_builder.rs
index 64005247..0ae54f10 100644
--- a/src/entity_builder.rs
+++ b/src/entity_builder.rs
@@ -80,7 +80,7 @@ use conn::{
     InProgress,
 };
 
-use errors::{
+use public_traits::errors::{
     Result,
 };
 
diff --git a/src/lib.rs b/src/lib.rs
index ffcb3f50..1d812f75 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,8 +10,6 @@
 
 #![recursion_limit="128"]
 
-#[macro_use]
-extern crate failure_derive;
 extern crate failure;
 
 #[macro_use]
@@ -34,6 +32,8 @@ extern crate mentat_query_pull;
 extern crate query_pull_traits;
 extern crate sql_traits;
 extern crate mentat_sql;
+#[macro_use]
+extern crate public_traits;
 
 #[cfg(feature = "syncable")]
 extern crate mentat_tolstoy;
@@ -130,9 +130,8 @@ macro_rules! kw {
     };
 }
 
-#[macro_use]
-pub mod errors;
-pub use errors::{
+pub use public_traits::errors;
+pub use public_traits::errors::{
     MentatError,
     Result,
 };
diff --git a/src/query.rs b/src/query.rs
index 044feacd..9ccfef12 100644
--- a/src/query.rs
+++ b/src/query.rs
@@ -76,7 +76,7 @@ pub use mentat_query_projector::{
     RelResult,
 };
 
-use errors::{
+use public_traits::errors::{
     MentatError,
     Result,
 };
diff --git a/src/query_builder.rs b/src/query_builder.rs
index 6012f8d1..097eb439 100644
--- a/src/query_builder.rs
+++ b/src/query_builder.rs
@@ -36,7 +36,7 @@ use ::{
     Variable,
 };
 
-use errors::{
+use public_traits::errors::{
     MentatError,
     Result,
 };
diff --git a/src/store.rs b/src/store.rs
index 9adfd423..05517ec8 100644
--- a/src/store.rs
+++ b/src/store.rs
@@ -59,7 +59,10 @@ use conn::{
     Syncable,
 };
 
-use errors::*;
+use public_traits::errors::{
+    MentatError,
+    Result,
+};
 
 use query::{
     PreparedResult,