diff --git a/.cargo/config.toml b/.cargo/config.toml
index 15d5d32..92403a7 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,4 +1,4 @@
-[target.x86_64-apple-darwin]
+[build]
 rustflags = [
   "-C", "link-arg=-undefined",
   "-C", "link-arg=dynamic_lookup",
diff --git a/instant-distance-py/src/lib.rs b/instant-distance-py/src/lib.rs
index eb976c2..1a5b034 100644
--- a/instant-distance-py/src/lib.rs
+++ b/instant-distance-py/src/lib.rs
@@ -371,37 +371,46 @@ big_array! { BigArray; DIMENSIONS }
 
 impl Point for FloatArray {
     fn distance(&self, rhs: &Self) -> f32 {
-        use std::arch::x86_64::{
-            _mm256_castps256_ps128, _mm256_extractf128_ps, _mm256_fmadd_ps, _mm256_load_ps,
-            _mm256_setzero_ps, _mm256_sub_ps, _mm_add_ps, _mm_add_ss, _mm_cvtss_f32, _mm_fmadd_ps,
-            _mm_load_ps, _mm_movehl_ps, _mm_shuffle_ps, _mm_sub_ps,
-        };
-        debug_assert_eq!(self.0.len() % 8, 4);
+        #[cfg(target_arch = "x86_64")]
+        {
+            use std::arch::x86_64::{
+                _mm256_castps256_ps128, _mm256_extractf128_ps, _mm256_fmadd_ps, _mm256_load_ps,
+                _mm256_setzero_ps, _mm256_sub_ps, _mm_add_ps, _mm_add_ss, _mm_cvtss_f32,
+                _mm_fmadd_ps, _mm_load_ps, _mm_movehl_ps, _mm_shuffle_ps, _mm_sub_ps,
+            };
+            debug_assert_eq!(self.0.len() % 8, 4);
 
-        unsafe {
-            let mut acc_8x = _mm256_setzero_ps();
-            for (lh_slice, rh_slice) in self.0.chunks_exact(8).zip(rhs.0.chunks_exact(8)) {
-                let lh_8x = _mm256_load_ps(lh_slice.as_ptr());
-                let rh_8x = _mm256_load_ps(rh_slice.as_ptr());
-                let diff = _mm256_sub_ps(lh_8x, rh_8x);
-                acc_8x = _mm256_fmadd_ps(diff, diff, acc_8x);
+            unsafe {
+                let mut acc_8x = _mm256_setzero_ps();
+                for (lh_slice, rh_slice) in self.0.chunks_exact(8).zip(rhs.0.chunks_exact(8)) {
+                    let lh_8x = _mm256_load_ps(lh_slice.as_ptr());
+                    let rh_8x = _mm256_load_ps(rh_slice.as_ptr());
+                    let diff = _mm256_sub_ps(lh_8x, rh_8x);
+                    acc_8x = _mm256_fmadd_ps(diff, diff, acc_8x);
+                }
+
+                let mut acc_4x = _mm256_extractf128_ps(acc_8x, 1); // upper half
+                let right = _mm256_castps256_ps128(acc_8x); // lower half
+                acc_4x = _mm_add_ps(acc_4x, right); // sum halves
+
+                let lh_4x = _mm_load_ps(self.0[DIMENSIONS - 4..].as_ptr());
+                let rh_4x = _mm_load_ps(rhs.0[DIMENSIONS - 4..].as_ptr());
+                let diff = _mm_sub_ps(lh_4x, rh_4x);
+                acc_4x = _mm_fmadd_ps(diff, diff, acc_4x);
+
+                let lower = _mm_movehl_ps(acc_4x, acc_4x);
+                acc_4x = _mm_add_ps(acc_4x, lower);
+                let upper = _mm_shuffle_ps(acc_4x, acc_4x, 0x1);
+                acc_4x = _mm_add_ss(acc_4x, upper);
+                _mm_cvtss_f32(acc_4x)
             }
-
-            let mut acc_4x = _mm256_extractf128_ps(acc_8x, 1); // upper half
-            let right = _mm256_castps256_ps128(acc_8x); // lower half
-            acc_4x = _mm_add_ps(acc_4x, right); // sum halves
-
-            let lh_4x = _mm_load_ps(self.0[DIMENSIONS - 4..].as_ptr());
-            let rh_4x = _mm_load_ps(rhs.0[DIMENSIONS - 4..].as_ptr());
-            let diff = _mm_sub_ps(lh_4x, rh_4x);
-            acc_4x = _mm_fmadd_ps(diff, diff, acc_4x);
-
-            let lower = _mm_movehl_ps(acc_4x, acc_4x);
-            acc_4x = _mm_add_ps(acc_4x, lower);
-            let upper = _mm_shuffle_ps(acc_4x, acc_4x, 0x1);
-            acc_4x = _mm_add_ss(acc_4x, upper);
-            _mm_cvtss_f32(acc_4x)
         }
+        #[cfg(not(target_arch = "x86_64"))]
+        self.0
+            .iter()
+            .zip(rhs.0.iter())
+            .map(|(&a, &b)| (a - b).powi(2))
+            .sum::<f32>()
     }
 }