diff --git a/redox-rt/src/lib.rs b/redox-rt/src/lib.rs
index de76d20cdb..6732c4062f 100644
--- a/redox-rt/src/lib.rs
+++ b/redox-rt/src/lib.rs
@@ -6,8 +6,8 @@
 
 use core::cell::UnsafeCell;
 
-#[allow(unused_imports)] // ExpectTlsFree for aarch64 and riscv64gc
-use generic_rt::ExpectTlsFree;
+#[cfg(any(target_arch = "x86_64", target_arch = "x86"))]
+use generic_rt::ExpectTlsFree; // not used on aarch64 or riscv64
 use generic_rt::GenericTcb;
 use syscall::Sigcontrol;
 
diff --git a/src/crti/src/lib.rs b/src/crti/src/lib.rs
index e7544354eb..5283a70ad2 100644
--- a/src/crti/src/lib.rs
+++ b/src/crti/src/lib.rs
@@ -3,7 +3,7 @@
 #![no_std]
 #![feature(linkage)]
 
-#[allow(unused_imports)] // riscv64gc fails
+#[cfg(not(target_arch = "riscv64"))]
 use core::arch::global_asm;
 
 #[cfg(target_arch = "x86")]
diff --git a/src/crtn/src/lib.rs b/src/crtn/src/lib.rs
index e5d3676e27..25b0418fd5 100644
--- a/src/crtn/src/lib.rs
+++ b/src/crtn/src/lib.rs
@@ -3,7 +3,7 @@
 #![no_std]
 #![feature(linkage)]
 
-#[allow(unused_imports)] // riscv64
+#[cfg(not(target_arch = "riscv64"))]
 use core::arch::global_asm;
 
 #[cfg(target_arch = "x86")]
diff --git a/src/ld_so/dso.rs b/src/ld_so/dso.rs
index b8ce022539..c2f5582069 100644
--- a/src/ld_so/dso.rs
+++ b/src/ld_so/dso.rs
@@ -10,11 +10,12 @@ use object::{
     },
 };
 
-#[allow(unused_imports)] // i586, riscv64gc: tcb::Tcb
+#[cfg(any(target_arch = "aarch64", target_arch = "x86_64"))]
+use super::tcb::Tcb;
 use super::{
     debug::{_r_debug, RTLDDebug},
     linker::{__plt_resolve_trampoline, GLOBAL_SCOPE, Resolve, Scope, Symbol},
-    tcb::{Master, Tcb},
+    tcb::Master,
 };
 use crate::{
     header::{dl_tls::__tls_get_addr, sys_mman},
@@ -26,10 +27,11 @@ use alloc::{
     sync::Arc,
     vec::Vec,
 };
-#[allow(unused_imports)] // i586, riscv64gc: mem::offset_of
+#[cfg(any(target_arch = "aarch64", target_arch = "x86_64"))]
+use core::mem::offset_of;
 use core::{
     ffi::c_char,
-    mem::{offset_of, size_of},
+    mem::size_of,
     ptr::{self, NonNull},
     slice,
     sync::atomic::{AtomicBool, Ordering},
diff --git a/src/ld_so/linker.rs b/src/ld_so/linker.rs
index 03380d25b9..cae48f49b5 100644
--- a/src/ld_so/linker.rs
+++ b/src/ld_so/linker.rs
@@ -5,9 +5,10 @@ use alloc::{
     sync::{Arc, Weak},
     vec::Vec,
 };
-#[allow(unused_imports)] // i586: NativeEndian, Rela, Sym
+use object::elf;
+#[cfg(not(target_arch = "x86"))]
 use object::{
-    NativeEndian, elf,
+    NativeEndian,
     read::elf::{Rela as _, Sym},
 };
 
@@ -16,7 +17,6 @@ use core::{
     ptr::{self, NonNull},
 };
 
-#[allow(unused_imports)] // i586: resolve_sym, c_uint
 use crate::{
     ALLOCATOR,
     c_str::{CStr, CString},
@@ -26,22 +26,25 @@ use crate::{
         fcntl, sys_mman,
         unistd::F_OK,
     },
-    ld_so::dso::{SymbolBinding, resolve_sym},
+    ld_so::dso::SymbolBinding,
     out::Out,
     platform::{
         Pal, Sys,
-        types::{c_int, c_uint, c_void},
+        types::{c_int, c_void},
     },
     sync::rwlock::RwLock,
 };
+#[cfg(not(target_arch = "x86"))]
+use crate::{ld_so::dso::resolve_sym, platform::types::c_uint};
 
-#[allow(unused_imports)] // i586: Rela
+#[cfg(not(target_arch = "x86"))]
+use super::dso::Rela;
 use super::{
     PATH_SEP,
     access::accessible,
     callbacks::LinkerCallbacks,
     debug::{_dl_debug_state, _r_debug, RTLDState},
-    dso::{DSO, ProgramHeader, Rela},
+    dso::{DSO, ProgramHeader},
     tcb::{Master, Tcb},
 };
 
diff --git a/src/platform/redox/ptrace.rs b/src/platform/redox/ptrace.rs
index d9a110e021..e364da9ef1 100644
--- a/src/platform/redox/ptrace.rs
+++ b/src/platform/redox/ptrace.rs
@@ -4,9 +4,9 @@
 //! we are NOT going to bend our API for the sake of
 //! compatibility. So, this module will be a hellhole.
 
-#[allow(unused_imports)]
-// i586, riscv64gc, aarch64: PalSignal, signal, sys_ptrace, core::mem, syscall, Pal, io::prelude
-use super::super::{ERRNO, Pal, PalPtrace, PalSignal, Sys, types::*};
+use super::super::{ERRNO, PalPtrace, Sys, types::*};
+#[cfg(target_arch = "x86_64")]
+use super::super::{Pal, PalSignal};
 #[allow(unused_imports)]
 #[cfg(target_arch = "aarch64")]
 use crate::header::arch_aarch64_user::user_regs_struct; // unused
@@ -19,17 +19,22 @@ use crate::{
     fs::File,
     header::{
         errno::{self as errnoh, EIO},
-        fcntl, signal, sys_ptrace,
+        fcntl,
     },
-    io::{self, prelude::*},
+    io,
     raw_cell::RawCell,
     sync::Mutex,
 };
+#[cfg(target_arch = "x86_64")]
+use crate::{
+    header::{signal, sys_ptrace},
+    io::prelude::*,
+};
 
 use alloc::collections::{BTreeMap, btree_map::Entry};
-#[allow(unused_imports)]
+#[cfg(target_arch = "x86_64")]
 use core::mem;
-#[allow(unused_imports)]
+#[cfg(target_arch = "x86_64")]
 use syscall;
 
 pub struct Session {