diff --git a/third_party/qemu/patches/bazel_support.patch b/third_party/qemu/patches/bazel_support.patch
index 9dea8d0..8905c39 100644
--- a/third_party/qemu/patches/bazel_support.patch
+++ b/third_party/qemu/patches/bazel_support.patch
@@ -853,7 +853,7 @@
 +        "util/bufferiszero.c",
 +        "util/cacheinfo.c",
 +        "util/compatfd.c",
-+        "util/coroutine-ucontext.c",
++        "util/coroutine-sigaltstack.c",
 +        "util/crc32c.c",
 +        "util/cutils.c",
 +        "util/drm.c",
diff --git a/third_party/qemu/patches/pregenerated_config_files.patch b/third_party/qemu/patches/pregenerated_config_files.patch
index fd5fe68..ced72f5 100644
--- a/third_party/qemu/patches/pregenerated_config_files.patch
+++ b/third_party/qemu/patches/pregenerated_config_files.patch
@@ -74,7 +74,7 @@
 +
 +#undef CONFIG_COCOA
 +
-+#define CONFIG_COROUTINE_BACKEND ucontext
++#define CONFIG_COROUTINE_BACKEND sigaltstack
 +
 +#define CONFIG_COROUTINE_POOL 0
 +
@@ -160,7 +160,7 @@
 +
 +#define CONFIG_MADVISE 1
 +
-+#define CONFIG_MALLOC_TRIM
++#undef CONFIG_MALLOC_TRIM
 +
 +#define CONFIG_MEMBARRIER 1
 +