diff --git a/index/wi/wisitoken/wisitoken-4.2.0.toml b/index/wi/wisitoken/wisitoken-4.2.0.toml
index 118cbcf19..266d8517e 100644
--- a/index/wi/wisitoken/wisitoken-4.2.0.toml
+++ b/index/wi/wisitoken/wisitoken-4.2.0.toml
@@ -15,11 +15,10 @@ project-files = ["build/wisitoken_alire.gpr", "build/wisitoken_alire_mains.gpr"]
 #  We use ".exe" extension even on non-Windows, to simplify the makefiles.
 executables = ["wisitoken-bnf-generate.exe"]
 
-[[actions]]
-# FIXME: it's not clear how to make this Windows-only.
-type = "pre-build"
+[[actions.'case(os)'.windows]]
+type = "post-fetch"
 command = ["dos2unix", "memory/s-memory.adb"]
-
+        
 [[depends-on]]
 # While wisitoken-bnf-generate can output a Tree-Sitter grammar file,
 # it does not use any tree-sitter code, so we have no dependency on
@@ -35,6 +34,6 @@ gnat = "(>=11 & <2000) | >=2021"
 
 
 [origin]
-commit = "0204c44b70d9dfe249e105fde5783a5be87a6692"
+commit = "463d2cbfeac33bc04b714d1b07e8a0dec2ee688e"
 url = "git+https://git.savannah.nongnu.org/git/ada-mode.git"