diff --git a/ci/shell.nix b/ci/shell.nix
index 173acc4cf..4201de531 100644
--- a/ci/shell.nix
+++ b/ci/shell.nix
@@ -24,7 +24,10 @@ stdenv.mkDerivation {
     pkgconfig
     protobuf3_6
     valgrind
+    wget
     zlib
+  ] ++ stdenv.lib.optionals (!stdenv.isDarwin) [
+    procps
   ] ++ stdenv.lib.optionals (stdenv.isDarwin) [
     darwin.apple_sdk.frameworks.CoreAudio
     darwin.apple_sdk.frameworks.AudioToolbox