diff --git a/pkgs/os-specific/bsd/openbsd/pkgs/sys/package.nix b/pkgs/os-specific/bsd/openbsd/pkgs/sys/package.nix
index 2d7242180bc4..6f220b171d5f 100644
--- a/pkgs/os-specific/bsd/openbsd/pkgs/sys/package.nix
+++ b/pkgs/os-specific/bsd/openbsd/pkgs/sys/package.nix
@@ -8,7 +8,7 @@
   baseConfig ? "GENERIC",
 }:
 (mkDerivation.override {
-  stdenvNoLibc = overrideCC stdenvNoLibc buildPackages.llvmPackages_18.clangNoLibc;
+  stdenvNoLibc = overrideCC stdenvNoLibc buildPackages.llvmPackages_20.clangNoLibc;
 })
   {
     path = "sys/arch/amd64";