diff --git a/pkgs/applications/misc/nnn/default.nix b/pkgs/applications/misc/nnn/default.nix
index 34a365ab67f..9eb5382cde9 100644
--- a/pkgs/applications/misc/nnn/default.nix
+++ b/pkgs/applications/misc/nnn/default.nix
@@ -21,6 +21,13 @@ stdenv.mkDerivation rec {
 
   makeFlags = [ "DESTDIR=${placeholder "out"}" "PREFIX=" ];
 
+  # shell completions
+  postInstall = ''
+    install -Dm555 scripts/auto-completion/bash/nnn-completion.bash $out/share/bash-completion/completions/nnn.bash
+    install -Dm555 scripts/auto-completion/zsh/_nnn -t $out/share/zsh/site-functions
+    install -Dm555 scripts/auto-completion/fish/nnn.fish -t $out/share/fish/vendor_completions.d
+  '';
+
   meta = {
     description = "Small ncurses-based file browser forked from noice";
     homepage = https://github.com/jarun/nnn;