diff --git a/scripts/mk_util.py b/scripts/mk_util.py
index 2d1715655..e3f7d7107 100644
--- a/scripts/mk_util.py
+++ b/scripts/mk_util.py
@@ -715,6 +715,9 @@ def parse_options():
     if IS_WINDOWS:
         # Installing under Windows doesn't make sense as the install prefix is used
         # but that doesn't make sense under Windows
+        # CMW: It makes perfectly good sense; the prefix is Python's sys.prefix,
+        # i.e., something along the lines of C:\Python\... At the moment we are not
+        # sure whether we would want to install libz3.dll into that directory though.
         PYTHON_INSTALL_ENABLED = False
     else:
         if not PYTHON_PACKAGE_DIR.startswith(PREFIX):
@@ -1352,21 +1355,19 @@ class PythonInstallComponent(Component):
         if not PYTHON_INSTALL_ENABLED:
             return
 
-        if self.is_osx_hack():
-            # Use full path that is outside of install prefix
+        if IS_WINDOWS or IS_OSX:
+            # Use full path that is possibly outside of install prefix
             self.pythonPkgDir = PYTHON_PACKAGE_DIR
-            self.in_prefix_install = False
+            self.in_prefix_install = PYTHON_PACKAGE_DIR.startswith(PREFIX)
             assert os.path.isabs(self.pythonPkgDir)
         else:
-            # Use path inside the prefix (should be the normal case)
+            # Use path inside the prefix (should be the normal case on Linux)
+            # CMW: Also normal on *BSD?
             assert PYTHON_PACKAGE_DIR.startswith(PREFIX)
             self.pythonPkgDir = strip_path_prefix(PYTHON_PACKAGE_DIR, PREFIX)
             assert not os.path.isabs(self.pythonPkgDir)
             assert self.in_prefix_install
 
-    def is_osx_hack(self):
-        return IS_OSX and not PYTHON_PACKAGE_DIR.startswith(PREFIX)
-
     def main_component(self):
         return False