diff --git a/pkgs/development/cuda-modules/backend-stdenv.nix b/pkgs/development/cuda-modules/backend-stdenv.nix
index 72685b541d159..bcca7118b163b 100644
--- a/pkgs/development/cuda-modules/backend-stdenv.nix
+++ b/pkgs/development/cuda-modules/backend-stdenv.nix
@@ -13,8 +13,10 @@ let
   gccMajorVersion = nvccCompatibilities.${cudaVersion}.gccMaxMajorVersion;
   cudaStdenv = stdenvAdapters.useLibsFrom stdenv pkgs."gcc${gccMajorVersion}Stdenv";
   passthruExtra = {
-    nixpkgsCompatibleLibstdcxx = lib.warn "cudaPackages.backendStdenv.nixpkgsCompatibleLibstdcxx is misnamed, deprecated, and will be removed after 24.05" cudaStdenv.cc.cxxStdlib.package;
-    # cc already exposed
+    # cudaPackages.backendStdenv.nixpkgsCompatibleLibstdcxx has been removed,
+    # if you need it you're likely doing something wrong. There has been a
+    # warning here for a month or so. Now we can no longer return any
+    # meaningful value in its place and drop the attribute entirely.
   };
   assertCondition = true;
 in