diff --git a/pyqtbuild/builder.py b/pyqtbuild/builder.py
index 3f35a7f..58701dd 100644
--- a/pyqtbuild/builder.py
+++ b/pyqtbuild/builder.py
@@ -51,15 +51,6 @@ class QmakeBuilder(Builder):
         """ Set default values for user options that haven't been set yet. """
 
         if tool in Option.BUILD_TOOLS:
-            # A PEP 517 frontend will set PATH so that sip-distinfo is found on
-            # it.  However for our own frontends we want to use the version
-            # corresponding to the frontend (and, anyway, the frontend may not
-            # be on PATH).
-            if tool != 'pep517':
-                self._sip_distinfo = os.path.join(
-                        os.path.abspath(os.path.dirname(sys.argv[0])),
-                        self._sip_distinfo)
-
             # Check we have a qmake.
             if self.qmake is None:
                 self.qmake = self._find_exe('qmake')