diff --git a/pkgs/applications/editors/emacs/elisp-packages/ess-R-object-popup/default.nix b/pkgs/applications/editors/emacs/elisp-packages/ess-R-object-popup/default.nix
index fa7725fbb94c..5eaee9bbfdfe 100644
--- a/pkgs/applications/editors/emacs/elisp-packages/ess-R-object-popup/default.nix
+++ b/pkgs/applications/editors/emacs/elisp-packages/ess-R-object-popup/default.nix
@@ -2,6 +2,8 @@
 , trivialBuild
 , fetchFromGitHub
 , emacs
+, popup
+, ess
 }:
 
 trivialBuild rec {
@@ -15,6 +17,11 @@ trivialBuild rec {
     hash = "sha256-YN8ZLXEbwTFdFfovkV2IXV9v6y/PTgCdiRQqbpRaF2E=";
   };
 
+  packageRequires = [
+    popup
+    ess
+  ];
+
   meta = {
     homepage = "https://github.com/myuhe/ess-R-object-popup.el";
     description = "Popup descriptions of R objects";