diff --git a/.github/workflows/wheels-dependencies.sh b/.github/workflows/wheels-dependencies.sh
index 3438f810b..b0b1ae6f7 100755
--- a/.github/workflows/wheels-dependencies.sh
+++ b/.github/workflows/wheels-dependencies.sh
@@ -134,6 +134,7 @@ function build_libavif {
             -DAVIF_CODEC_AOM=LOCAL \
             -DENABLE_NASM=ON \
             -DCMAKE_MODULE_PATH=/tmp/cmake/Modules \
+            -DCMAKE_BUILD_TYPE=MinSizeRel \
             . \
         && make install)
     touch libavif-stamp
diff --git a/Tests/test_file_avif.py b/Tests/test_file_avif.py
index 1d5665394..e967634a2 100644
--- a/Tests/test_file_avif.py
+++ b/Tests/test_file_avif.py
@@ -129,14 +129,14 @@ class TestFileAvif:
 
             # avifdec hopper.avif avif/hopper_avif_write.png
             assert_image_similar_tofile(
-                reloaded, "Tests/images/avif/hopper_avif_write.png", 6.02
+                reloaded, "Tests/images/avif/hopper_avif_write.png", 6.14
             )
 
             # This test asserts that the images are similar. If the average pixel
             # difference between the two images is less than the epsilon value,
             # then we're going to accept that it's a reasonable lossy version of
             # the image.
-            assert_image_similar(reloaded, im, 8.62)
+            assert_image_similar(reloaded, im, 8.65)
 
     def test_AvifEncoder_with_invalid_args(self) -> None:
         """
diff --git a/winbuild/build_prepare.py b/winbuild/build_prepare.py
index b23938857..3b0e0d577 100644
--- a/winbuild/build_prepare.py
+++ b/winbuild/build_prepare.py
@@ -57,7 +57,10 @@ def cmd_nmake(
 
 
 def cmds_cmake(
-    target: str | tuple[str, ...] | list[str], *params: str, build_dir: str = "."
+    target: str | tuple[str, ...] | list[str],
+    *params: str,
+    build_dir: str = ".",
+    build_type: str = "Release",
 ) -> list[str]:
     if not isinstance(target, str):
         target = " ".join(target)
@@ -66,7 +69,7 @@ def cmds_cmake(
         " ".join(
             [
                 "{cmake}",
-                "-DCMAKE_BUILD_TYPE=Release",
+                f"-DCMAKE_BUILD_TYPE={build_type}",
                 "-DCMAKE_VERBOSE_MAKEFILE=ON",
                 "-DCMAKE_RULE_MESSAGES:BOOL=OFF",  # for NMake
                 "-DCMAKE_C_COMPILER=cl.exe",  # for Ninja
@@ -393,6 +396,7 @@ DEPS: dict[str, dict[str, Any]] = {
                 "-DAVIF_LIBYUV=LOCAL",
                 "-DAVIF_CODEC_AOM=LOCAL",
                 "-DCMAKE_POLICY_VERSION_MINIMUM=3.5",
+                build_type="MinSizeRel",
             ),
             cmd_xcopy("include", "{inc_dir}"),
         ],