diff --git a/setup.py b/setup.py
index 52babbc..60426d4 100755
--- a/setup.py
+++ b/setup.py
@@ -1017,7 +1017,6 @@ try:
         packages=["PIL"],
         package_dir={"": "src"},
         keywords=["Imaging"],
-        zip_safe=not (debug_build() or PLATFORM_MINGW),
     )
 except RequiredDependencyException as err:
     msg = f"""
diff --git a/src/libImaging/ImPlatform.h b/src/libImaging/ImPlatform.h
index 9a2060e..c956fc0 100644
--- a/src/libImaging/ImPlatform.h
+++ b/src/libImaging/ImPlatform.h
@@ -34,7 +34,7 @@
 #ifdef _WIN32
 
 #define WIN32_LEAN_AND_MEAN
-#include <Windows.h>
+#include <windows.h>
 
 #else
 /* For System that are not Windows, we'll need to define these. */
diff --git a/setup.py b/setup.py
index 60426d4..2a922ea 100755
--- a/setup.py
+++ b/setup.py
@@ -291,7 +291,7 @@ class pil_build_ext(build_ext):
             "xcb",
         ]
 
-        required = {"jpeg", "zlib"}
+        required = {"zlib"}
         vendor = set()
 
         def __init__(self):
diff --git a/setup.py b/setup.py
index 60426d4..0596287 100755
--- a/setup.py
+++ b/setup.py
@@ -572,16 +572,6 @@ class pil_build_ext(build_ext):
 
         # FIXME: check /opt/stuff directories here?
 
-        # standard locations
-        if not self.disable_platform_guessing:
-            _add_directory(library_dirs, "/usr/local/lib")
-            _add_directory(include_dirs, "/usr/local/include")
-
-            _add_directory(library_dirs, "/usr/lib")
-            _add_directory(include_dirs, "/usr/include")
-            # alpine, at least
-            _add_directory(library_dirs, "/lib")
-
         if sys.platform == "win32":
             # on Windows, look for the OpenJPEG libraries in the location that
             # the official installer puts them