diff --git a/deploy.py b/deploy.py
index 486750d9ef574465622c4aff4dbd37b01cef4fc8..639b70bb45d118a92c05f15697aeb8c2f99a6cb8 100755
--- a/deploy.py
+++ b/deploy.py
@@ -291,8 +291,8 @@ class OpenSKInstaller:
       # empty value.
       target_toolchain.append("")
     current_version = self.checked_command_output(["rustc", "--version"])
-    if not all((target_toolchain[0] in current_version,
-                target_toolchain[1] in current_version)):
+    if not (target_toolchain[0] in current_version and
+            target_toolchain[1] in current_version):
       info("Updating rust toolchain to {}".format("-".join(target_toolchain)))
       # Need to update
       self.checked_command_output(