diff --git a/.config/nvim/plugin/autopairs.lua b/.config/nvim/plugin/autopairs.lua
index c34e4250..4cba59b3 100644
--- a/.config/nvim/plugin/autopairs.lua
+++ b/.config/nvim/plugin/autopairs.lua
@@ -5,7 +5,7 @@ local cmp = require("cmp")
 local cmp_autopairs = require("nvim-autopairs.completion.cmp")
 
 local langs = {
-    haskell_like = { "haskell", "nix" },
+    haskell_like = { "haskell", "nix", "ruler" },
     ml_like = { "ocaml", "why3", "skel", "isabelle" },
     html_like = { "html", "htmldjango" },
     latex_like = { "typst", "latex" },
@@ -81,10 +81,10 @@ npairs.add_rules {
 }
 pair_with_insertion("$", " ", "$", langs.latex_like)
 
-pair_with_insertion("{", "-", "}", "haskell")
-pair_with_insertion("{-", " ", "-}", "haskell") -- block comment
-pair_with_insertion("{-", "#", "-}", "haskell") -- language flags
-pair_with_insertion("{-#", " ", "#-}", "haskell")
+pair_with_insertion("{", "-", "}", langs.haskell_like)
+pair_with_insertion("{-", " ", "-}", langs.haskell_like) -- block comment
+pair_with_insertion("{-", "#", "-}", langs.haskell_like) -- language flags
+pair_with_insertion("{-#", " ", "#-}", langs.haskell_like)
 pair_with_insertion("(", " ", ")", langs.haskell_like)
 
 npairs.add_rules {
diff --git a/nix/configurations/vanadium/home/programs.nix b/nix/configurations/vanadium/home/programs.nix
index 73ff75d5..597e550a 100644
--- a/nix/configurations/vanadium/home/programs.nix
+++ b/nix/configurations/vanadium/home/programs.nix
@@ -75,6 +75,7 @@
     pkgs.niv
     pkgs.npins
     pkgs.nix-tree
+    pkgs.nh
 
     # productivity / media
     pkgs.evolution