diff --git a/nix/dev-shell.nix b/nix/dev-shell.nix
--- a/nix/dev-shell.nix
+++ b/nix/dev-shell.nix
@@ -6,6 +6,7 @@
 , aws-sdk-cpp
 , better-prompt
 , boost
+, c-ares_cmake-config
 , cargo
 , cmake
 , cmake-format
@@ -65,6 +66,7 @@
 
     # Tunnelbroker + CMake
     amqp-cpp
+    c-ares_cmake-config
     cryptopp
     cmake
     cmake-format # linting
diff --git a/nix/overlay.nix b/nix/overlay.nix
--- a/nix/overlay.nix
+++ b/nix/overlay.nix
@@ -43,6 +43,12 @@
 
   better-prompt = prev.callPackage ./better-prompt.nix { };
 
+  # c-ares is used to bootstrap curl, so cmake is not available in the default
+  # build
+  c-ares_cmake-config = prev.c-ares.overrideAttrs(o: {
+    nativeBuildInputs = (o.nativeBuildInputs or []) ++ [ prev.cmake ];
+  });
+
   protobuf_3_15_cmake = prev.callPackage ./protobuf_3_15.nix { };
 
   devShell = final.callPackage ./dev-shell.nix { };