diff --git a/pkgs/development/libraries/aws-sdk-cpp/default.nix b/pkgs/development/libraries/aws-sdk-cpp/default.nix
index ffe15652a3d9..215fbeb7071f 100644
--- a/pkgs/development/libraries/aws-sdk-cpp/default.nix
+++ b/pkgs/development/libraries/aws-sdk-cpp/default.nix
@@ -38,7 +38,8 @@ stdenv.mkDerivation rec {
   ] ++ lib.optional (!customMemoryManagement) "-DCUSTOM_MEMORY_MANAGEMENT=0"
   ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
     "-DENABLE_TESTING=OFF"
-    "-DCURL_HAS_H2=0"
+    "-DCURL_HAS_H2=1"
+    "-DCURL_HAS_TLS_PROXY=1"
   ] ++ lib.optional (apis != ["*"])
     "-DBUILD_ONLY=${lib.concatStringsSep ";" apis}";