diff --git a/core/ext/mod.rs b/core/ext/mod.rs
index 52761741b..7e5cb375a 100644
--- a/core/ext/mod.rs
+++ b/core/ext/mod.rs
@@ -4,9 +4,11 @@ mod vtab_xconnect;
 use crate::schema::{Schema, Table};
 #[cfg(all(target_os = "linux", feature = "io_uring"))]
 use crate::UringIO;
-use crate::{function::ExternalFunc, Connection, Database, LimboError, IO};
+use crate::{function::ExternalFunc, Connection, Database};
 use crate::{vtab::VirtualTable, SymbolTable};
 #[cfg(feature = "fs")]
+use crate::{LimboError, IO};
+#[cfg(feature = "fs")]
 pub use dynamic::{add_builtin_vfs_extensions, add_vfs_module, list_vfs_modules, VfsMod};
 use std::{
     ffi::{c_char, c_void, CStr, CString},
@@ -168,6 +170,7 @@ impl Database {
             syms,
             schema: schema_mutex_ptr as *mut c_void,
         }));
+        #[allow(unused)]
         let mut ext_api = ExtensionApi {
             ctx: ctx as *mut c_void,
             register_scalar_function,
diff --git a/core/io/unix.rs b/core/io/unix.rs
index d15a23a53..c07285bc9 100644
--- a/core/io/unix.rs
+++ b/core/io/unix.rs
@@ -16,7 +16,9 @@ use std::{
 };
 
 use std::{io::ErrorKind, sync::Arc};
-use tracing::{debug, instrument, trace, Level};
+#[cfg(feature = "fs")]
+use tracing::debug;
+use tracing::{instrument, trace, Level};
 
 struct OwnedCallbacks(UnsafeCell<Callbacks>);
 // We assume we locking on IO level is done by user.
@@ -25,6 +27,7 @@ unsafe impl Sync for OwnedCallbacks {}
 struct BorrowedCallbacks<'io>(UnsafeCell<&'io mut Callbacks>);
 
 impl OwnedCallbacks {
+    #[allow(dead_code)]
     fn new() -> Self {
         Self(UnsafeCell::new(Callbacks::new()))
     }
@@ -57,6 +60,7 @@ impl BorrowedCallbacks<'_> {
 struct EventsHandler(UnsafeCell<Events>);
 
 impl EventsHandler {
+    #[allow(dead_code)]
     fn new() -> Self {
         Self(UnsafeCell::new(Events::new()))
     }
@@ -87,6 +91,7 @@ impl BorrowedPollHandler<'_> {
 }
 
 impl PollHandler {
+    #[allow(dead_code)]
     fn new() -> Self {
         Self(UnsafeCell::new(Poller::new().unwrap()))
     }
diff --git a/core/lib.rs b/core/lib.rs
index 946898db8..e1b5c0491 100644
--- a/core/lib.rs
+++ b/core/lib.rs
@@ -45,6 +45,7 @@ use crate::storage::sqlite3_ondisk::is_valid_page_size;
 use crate::storage::{header_accessor, wal::DummyWAL};
 use crate::translate::optimizer::optimize_plan;
 use crate::translate::pragma::TURSO_CDC_DEFAULT_TABLE_NAME;
+#[cfg(feature = "fs")]
 use crate::util::{OpenMode, OpenOptions};
 use crate::vtab::VirtualTable;
 use core::str;
@@ -935,6 +936,7 @@ impl Connection {
     }
 
     pub fn list_vfs(&self) -> Vec<String> {
+        #[allow(unused_mut)]
         let mut all_vfs = vec![String::from("memory")];
         #[cfg(feature = "fs")]
         {
diff --git a/core/util.rs b/core/util.rs
index 4e485d7d6..d6df82059 100644
--- a/core/util.rs
+++ b/core/util.rs
@@ -1,3 +1,4 @@
+#![allow(unused)]
 use crate::translate::expr::WalkControl;
 use crate::types::IOResult;
 use crate::IO;
diff --git a/core/vdbe/execute.rs b/core/vdbe/execute.rs
index ef9aa97ad..855658201 100644
--- a/core/vdbe/execute.rs
+++ b/core/vdbe/execute.rs
@@ -89,9 +89,10 @@ use crate::{
 };
 
 use super::{make_record, Program, ProgramState, Register};
-use crate::{
-    bail_constraint_error, must_be_btree_cursor, resolve_ext_path, MvStore, Pager, Result,
-};
+
+#[cfg(feature = "fs")]
+use crate::resolve_ext_path;
+use crate::{bail_constraint_error, must_be_btree_cursor, MvStore, Pager, Result};
 
 macro_rules! return_if_io {
     ($expr:expr) => {