diff --git a/pkgs/by-name/ll/llhttp/package.nix b/pkgs/by-name/ll/llhttp/package.nix
index 8c6b30e0230b..eab40942b392 100644
--- a/pkgs/by-name/ll/llhttp/package.nix
+++ b/pkgs/by-name/ll/llhttp/package.nix
@@ -31,8 +31,8 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   cmakeFlags = [
-    (lib.cmakeBool "BUILD_SHARED_LIBS" (!stdenv.hostPlatform.isStatic))
-    (lib.cmakeBool "BUILD_STATIC_LIBS" stdenv.hostPlatform.isStatic)
+    (lib.cmakeBool "LLHTTP_BUILD_SHARED_LIBS" (!stdenv.hostPlatform.isStatic))
+    (lib.cmakeBool "LLHTTP_BUILD_STATIC_LIBS" stdenv.hostPlatform.isStatic)
   ];
 
   passthru.updateScript = nix-update-script {