diff --git a/system/desktop/home-manager/spacemacs.nix b/system/desktop/home-manager/spacemacs.nix
index a2ad8b1..8c49bb3 100644
--- a/system/desktop/home-manager/spacemacs.nix
+++ b/system/desktop/home-manager/spacemacs.nix
@@ -163,9 +163,28 @@ in
         (require 'lsp-haskell)
         ;; (add-hook 'haskell-mode-hook #'lsp)
         (add-hook 'haskell-mode-hook #'direnv-update-environment)
+
+        ;; setup run-assoc
+        ;; in dired mode use C-<RETURN> to open file in associated program
+        (load "~/.spacemacs.d/run-assoc.el")
+        (setq associated-program-alist
+        '(
+          ("${pkgs.evince}/bin/evince" "\\.pdf$")
+          ("${pkgs.libreoffice}/bin/libreoffice" "\\.odt$")
+          ${
+            let
+              suffixes = ["jpg" "jpeg" "png"];
+              rule = suffix: ''("${pkgs.feh}/bin/feh --auto-rotate --auto-zoom" "\\.${suffix}$")'';
+            in
+            lib.concatStringsSep "\n  " (builtins.map rule suffixes)}
+          )
+        )
       '';
 
-
+      home.file.".spacemacs.d/run-assoc.el".source = pkgs.fetchurl {
+        url = "https://www.emacswiki.org/emacs/download/run-assoc.el";
+        sha256 = "1rg0pa09zfslgqnhbqvaa6vdi2fmanrpyzq67ppiin0h1kdgs4im";
+      };
 
       home.file.".ctags.d/terraform.ctags".text = ''
         --langdef=terraform