diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 98a5f91..f60da9d 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,5 +1,7 @@
 [toolchain]
-channel = "nightly"
+# The nightly version that was build on 24-07-2025 is the last known working version,
+# the c-int-width definition for rust targets has changed from a string to a u16
+channel = "nightly-2025-07-24"
 targets = [
     "x86_64-unknown-none"
 ]