Fix tokenizer extension compilation.

Author: drupol

pkgs/package-overrides.nix

@@ -575,7 +575,9 @@ in
         ourPatches ++ upstreamPatches;
 
       nativeBuildInputs = attrs.nativeBuildInputs ++ [
+        # Tarballs ship pre-generated parser files.
         pkgs.bison
+        pkgs.flex
       ];
 
       postPatch = ''
@@ -720,22 +722,22 @@ in
           patchName patch == "fix-tokenizer-php81.patch" -> lib.versionAtLeast prev.php.version "8.1"
         )
         (attrs.patches or []);
-    });
 
-    tokenizer = prev.extensions.tokenizer.overrideAttrs (attrs: {
-      patches = builtins.filter
-        (patch:
-          # The patch do not apply to PHP < 8.1
-          patchName patch == "fix-tokenizer-php81.patch" -> lib.versionAtLeast prev.php.version "8.1"
-        )
-        (attrs.patches or []);
-
-      nativeBuildInputs = attrs.nativeBuildInputs or [ ] ++ lib.optionals isBuiltFromGit [
+      nativeBuildInputs = attrs.nativeBuildInputs ++ [
         # Tarballs ship pre-generated parser files.
         pkgs.bison
         pkgs.flex
       ];
 
+      postPatch = ''
+        echo '
+          # TODO: Add explanation here.
+          # See https://github.com/fossar/nix-phps/pull/104#issuecomment-1113964195
+          PHP_PROG_BISON([3.0.0])
+          PHP_PROG_RE2C([0.13.4])
+        ' | cat - ext/tokenizer/config.m4 > ext/tokenizer/config.m4.tmp
+        mv ext/tokenizer/config.m4{.tmp,}
+      '';
     });
 
     wddx =