diff --git a/src/pixie/blends.nim b/src/pixie/blends.nim
index 83783e7..997f602 100644
--- a/src/pixie/blends.nim
+++ b/src/pixie/blends.nim
@@ -1,7 +1,7 @@
 ## Blending modes.
 import chroma, math
 
-when defined(amd64):
+when defined(amd64) and not defined(pixieNoSimd):
   import nimsimd/sse2
 
 # See https://www.w3.org/TR/compositing-1/
@@ -264,7 +264,7 @@ proc blendExcludeMaskFloats*(backdrop, source: Color): Color {.inline.} =
 proc blendOverwriteFloats*(backdrop, source: Color): Color {.inline.} =
   source
 
-when defined(amd64):
+when defined(amd64) and not defined(pixieNoSimd):
   proc alphaFix(backdrop, source: ColorRGBA, vb, vs, vm: M128): ColorRGBA =
     let
       sa = source.a.float32
@@ -417,7 +417,7 @@ proc blendSoftLight(backdrop, source: ColorRGBA): ColorRGBA =
   #     (2 * source * backdrop) div 255
   #   ).uint8
 
-  when defined(amd64):
+  when defined(amd64) and not defined(pixieNoSimd):
     let
       vb = mm_setr_ps(backdrop.r.float32, backdrop.g.float32, backdrop.b.float32, 0)
       vs = mm_setr_ps(source.r.float32, source.g.float32, source.b.float32, 0)
diff --git a/src/pixie/images.nim b/src/pixie/images.nim
index c306180..0a12e80 100644
--- a/src/pixie/images.nim
+++ b/src/pixie/images.nim
@@ -1,4 +1,7 @@
-import chroma, blends, bumpy, vmath, common, nimsimd/sse2, system/memory
+import chroma, blends, bumpy, vmath, common, system/memory
+
+when defined(amd64) and not defined(pixieNoSimd):
+  import nimsimd/sse2
 
 const h = 0.5.float32
 
@@ -71,7 +74,7 @@ proc fillUnsafe(data: var seq[ColorRGBA], rgba: ColorRGBA, start, len: int) =
     nimSetMem(data[start].addr, rgba.r.cint, len * 4)
   else:
     var i = start
-    when defined(amd64):
+    when defined(amd64) and not defined(pixieNoSimd):
       # When supported, SIMD fill until we run out of room
       let m = mm_set1_epi32(cast[int32](rgba))
       for j in countup(i, start + len - 8, 8):
@@ -178,7 +181,7 @@ proc draw*(a, b: Image, pos = vec2(0, 0), blendMode = bmNormal) {.inline.}
 proc invert*(image: Image) =
   ## Inverts all of the colors and alpha.
   var i: int
-  when defined(amd64):
+  when defined(amd64) and not defined(pixieNoSimd):
     let vec255 = mm_set1_epi8(255)
     while i < image.data.len - 4:
       var m = mm_loadu_si128(image.data[i].addr)
@@ -196,7 +199,7 @@ proc invert*(image: Image) =
 proc toAlphy*(image: Image) =
   ## Converts an image to premultiplied alpha from straight.
   var i: int
-  when defined(amd64):
+  when defined(amd64) and not defined(pixieNoSimd):
     # When supported, SIMD convert as much as possible
     let
       alphaMask = mm_set1_epi32(cast[int32](0xff000000))