Try to use nvim as $EDITOR

config/default.nix

@@ -14,6 +14,7 @@
     ./services/restic.nix
     ./specialization.nix
     ./services/promtail.nix
+    ./env.nix
   ];
   services.openssh.enable = true;
   environment.systemPackages = with pkgs; [

config/env.nix

@@ -0,0 +1,13 @@
+{ config, pkgs, lib, ... }: {
+  config.environment.extraInit =
+    let
+      systemdBin = lib.getBin config.systemd.package;
+    in
+    ''
+      set -a
+      . /dev/fd/0 <<EOF
+        $(${systemdBin}/lib/systemd/user-environment-generators/30-systemd-environment-d-generator)
+      EOF
+      set +a
+    '';
+}

config/home-manager/base.nix

@@ -104,11 +104,11 @@ desktop: {pkgs, ...}: {
         userName = "mdelenk@hs-mittweida.de";
         primary = false;
       };
+    };
+  config.systemd.user.sessionVariables = {
+    EDITOR = "nvim";
   };
   home = {
-    sessionVariables = {
-      EDITOR = "nvim";
-    };
     shellAliases = {
       vim = "nvim";
       cat = "bat";