diff --git a/pkgs/development/libraries/aws-c-event-stream/default.nix b/pkgs/development/libraries/aws-c-event-stream/default.nix
index ccc4abb85fdb..cc26c29c9d1d 100644
--- a/pkgs/development/libraries/aws-c-event-stream/default.nix
+++ b/pkgs/development/libraries/aws-c-event-stream/default.nix
@@ -16,6 +16,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ aws-c-common aws-checksums ] ++ lib.optional stdenv.hostPlatform.isMusl libexecinfo;
 
   cmakeFlags = [
+    "-DBUILD_SHARED_LIBS:BOOL=ON"
     "-DCMAKE_MODULE_PATH=${aws-c-common}/lib/cmake"
   ];
 
diff --git a/pkgs/development/libraries/aws-checksums/default.nix b/pkgs/development/libraries/aws-checksums/default.nix
index 99cefde8937f..886383bf9610 100644
--- a/pkgs/development/libraries/aws-checksums/default.nix
+++ b/pkgs/development/libraries/aws-checksums/default.nix
@@ -13,6 +13,8 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ cmake ];
 
+  cmakeFlags = [ "-DBUILD_SHARED_LIBS:BOOL=ON" ];
+
   meta = with lib; {
     description = "HW accelerated CRC32c and CRC32";
     homepage = https://github.com/awslabs/aws-checksums;