diff --git a/pkgs/development/python-modules/pwntools/default.nix b/pkgs/development/python-modules/pwntools/default.nix
index ce3b58296aa8..db47ca9e0e49 100644
--- a/pkgs/development/python-modules/pwntools/default.nix
+++ b/pkgs/development/python-modules/pwntools/default.nix
@@ -45,6 +45,10 @@ buildPythonPackage rec {
     # Upstream hardcoded the check for the command `gdb-multiarch`;
     # Forcefully use the provided debugger as `gdb`.
     sed -i 's/gdb-multiarch/${debuggerName}/' pwnlib/gdb.py
+
+    # Disable update checks
+    substituteInPlace pwnlib/update.py \
+      --replace-fail 'disabled        = False' 'disabled        = True'
   '';
 
   nativeBuildInputs = [ installShellFiles ];