diff --git ninja-clean/configure.py ninja-workdir/configure.py
index 03b5ce4..66af21a 100755
--- ninja-clean/configure.py
+++ ninja-workdir/configure.py
@@ -65,16 +65,21 @@ class Platform(object):
             self._platform = 'os400'
         elif self._platform.startswith('dragonfly'):
             self._platform = 'dragonfly'
+        elif self._platform.startswith('astral'):
+            self._platform = 'astral'
 
     @staticmethod
     def known_platforms() -> List[str]:
       return ['linux', 'darwin', 'freebsd', 'openbsd', 'solaris', 'sunos5',
               'mingw', 'msvc', 'gnukfreebsd', 'bitrig', 'netbsd', 'aix',
-              'dragonfly']
+              'dragonfly', 'astral']
 
     def platform(self) -> str:
         return self._platform  # type: ignore # Incompatible return value type
 
+    def is_astral(self) -> bool:
+        return self._platform == 'astral'
+
     def is_linux(self) -> bool:
         return self._platform == 'linux'
 
@@ -108,7 +113,7 @@ class Platform(object):
 
     def supports_ppoll(self) -> bool:
         return self._platform in ('freebsd', 'linux', 'openbsd', 'bitrig',
-                                  'dragonfly')
+                                  'dragonfly', 'astral')
 
     def supports_ninja_browse(self) -> bool:
         return (not self.is_windows()