diff --git a/fang/Cargo.toml b/fang/Cargo.toml
index 5d8bc10..97be165 100644
--- a/fang/Cargo.toml
+++ b/fang/Cargo.toml
@@ -26,10 +26,10 @@ blocking = ["dep:diesel", "dep:diesel-derive-enum", "dep:dotenvy", "diesel?/chro
 blocking-postgres = [ "blocking", "diesel?/postgres"]
 blocking-sqlite = ["blocking", "diesel?/sqlite" ]
 blocking-mysql = [ "blocking", "diesel?/mysql"]
-migrations-postgres = ["migrations"]
-migrations-sqlite = ["migrations"]
-migrations-mysql = ["migrations"]
-migrations = ["dep:diesel_migrations"]
+migrations-postgres = ["migrations", "diesel?/postgres"]
+migrations-sqlite = ["migrations", "diesel?/sqlite"]
+migrations-mysql = ["migrations", "diesel?/mysql"]
+migrations = ["dep:diesel_migrations", "dep:diesel"]
 
 
 [dev-dependencies]
diff --git a/fang/src/asynk.rs b/fang/src/asynk.rs
index 2a8ab87..58d8fcf 100644
--- a/fang/src/asynk.rs
+++ b/fang/src/asynk.rs
@@ -1,10 +1,20 @@
+// Here you should put all the backends based on sqlx library
+#[cfg(any(
+    feature = "asynk-postgres",
+    feature = "asynk-mysql",
+    feature = "asynk-sqlite"
+))]
+pub mod backend_sqlx;
+
 pub mod async_queue;
 pub mod async_runnable;
 pub mod async_worker;
 pub mod async_worker_pool;
-pub mod backend_sqlx;
 
-pub use async_queue::*;
-pub use async_runnable::AsyncRunnable;
-pub use async_worker::*;
-pub use async_worker_pool::*;
+// Here you should put all the backends.
+#[cfg(any(
+    feature = "asynk-postgres",
+    feature = "asynk-mysql",
+    feature = "asynk-sqlite"
+))]
+pub use {async_queue::*, async_runnable::AsyncRunnable, async_worker::*, async_worker_pool::*};
diff --git a/fang/src/asynk/backend_sqlx.rs b/fang/src/asynk/backend_sqlx.rs
index 4093ed1..cfe57bb 100644
--- a/fang/src/asynk/backend_sqlx.rs
+++ b/fang/src/asynk/backend_sqlx.rs
@@ -1,15 +1,11 @@
-use chrono::{DateTime, Duration, Utc};
+use chrono::{DateTime, Utc};
 use sha2::Digest;
 use sha2::Sha256;
-use sqlx::any::AnyQueryResult;
-use sqlx::database::HasArguments;
-use sqlx::Database;
-use sqlx::Encode;
-use sqlx::Executor;
-use sqlx::FromRow;
-use sqlx::IntoArguments;
-use sqlx::Pool;
-use sqlx::Type;
+use {
+    chrono::Duration, sqlx::any::AnyQueryResult, sqlx::database::HasArguments, sqlx::Database,
+    sqlx::Encode, sqlx::Executor, sqlx::FromRow, sqlx::IntoArguments, sqlx::Pool, sqlx::Type,
+};
+
 use std::fmt::Debug;
 use typed_builder::TypedBuilder;
 use uuid::Uuid;
@@ -40,7 +36,6 @@ pub(crate) enum BackendSqlX {
     MySql,
 }
 
-#[allow(dead_code)]
 #[derive(TypedBuilder, Clone)]
 pub(crate) struct QueryParams<'a> {
     #[builder(default, setter(strip_option))]
@@ -63,7 +58,6 @@ pub(crate) struct QueryParams<'a> {
     task: Option<&'a Task>,
 }
 
-#[allow(dead_code)]
 pub(crate) enum Res {
     Bigint(u64),
     Task(Task),
@@ -143,7 +137,6 @@ use crate::FangTaskState;
 use crate::InternalPool;
 use crate::Task;
 
-#[allow(dead_code)]
 pub(crate) fn calculate_hash(json: &str) -> String {
     let mut hasher = Sha256::new();
     hasher.update(json.as_bytes());
diff --git a/fang/src/lib.rs b/fang/src/lib.rs
index 7c1d009..f50abe7 100644
--- a/fang/src/lib.rs
+++ b/fang/src/lib.rs
@@ -149,7 +149,7 @@ impl From<FangTaskState> for &str {
 
 #[derive(Debug, Eq, PartialEq, Clone, TypedBuilder)]
 #[cfg_attr(feature = "blocking", derive(Queryable, Identifiable))]
-#[diesel(table_name = fang_tasks)]
+#[cfg_attr(feature = "blocking", diesel(table_name = fang_tasks))]
 pub struct Task {
     #[builder(setter(into))]
     pub id: Uuid,
@@ -204,9 +204,18 @@ pub mod blocking;
 #[cfg(feature = "blocking")]
 pub use blocking::*;
 
-#[cfg(feature = "asynk")]
+#[cfg(any(
+    feature = "asynk-postgres",
+    feature = "asynk-mysql",
+    feature = "asynk-sqlite"
+))]
 pub mod asynk;
 
+#[cfg(any(
+    feature = "asynk-postgres",
+    feature = "asynk-mysql",
+    feature = "asynk-sqlite"
+))]
 #[cfg(feature = "asynk")]
 pub use asynk::*;
 
@@ -218,10 +227,10 @@ pub use async_trait::async_trait;
 pub use fang_derive_error::ToFangError;
 
 #[cfg(feature = "migrations")]
-use diesel_migrations::{embed_migrations, EmbeddedMigrations, MigrationHarness};
-
-#[cfg(feature = "migrations")]
-use std::error::Error as SomeError;
+use {
+    diesel_migrations::{embed_migrations, EmbeddedMigrations, MigrationHarness},
+    std::error::Error as SomeError,
+};
 
 #[cfg(feature = "migrations-postgres")]
 use diesel::pg::Pg;