diff --git a/lib/pkg-lists.nix b/lib/pkg-lists.nix
new file mode 100644
index 00000000..76d49e86
--- /dev/null
+++ b/lib/pkg-lists.nix
@@ -0,0 +1,23 @@
+# This file isn't (currently) part of `lib.nixvim`, but is used directly by `efmls` and `none-ls` pkg lists
+lib: rec {
+  # Produces an attrset of { ${name} = name; }
+  topLevel = names: lib.genAttrs names lib.id;
+
+  # Produces an attrset of { ${name} = null; }
+  nullAttrs = names: lib.genAttrs names (_: null);
+
+  # Produces an attrset of { ${name} = [ scope name ]; }
+  # Where the "scope" is the (nested) attr names,
+  # and "name" is the value.
+  # If the name value is a list, it will be expanded into multiple attrs.
+  scoped = lib.concatMapAttrs (
+    scope: v:
+    if builtins.isAttrs v then
+      lib.mapAttrs (_: loc: [ scope ] ++ loc) (scoped v)
+    else
+      lib.genAttrs (lib.toList v) (name: [
+        scope
+        name
+      ])
+  );
+}
diff --git a/plugins/lsp/language-servers/efmls-configs-pkgs.nix b/plugins/lsp/language-servers/efmls-configs-pkgs.nix
index e5703b95..2a99b6be 100644
--- a/plugins/lsp/language-servers/efmls-configs-pkgs.nix
+++ b/plugins/lsp/language-servers/efmls-configs-pkgs.nix
@@ -1,4 +1,8 @@
-lib: {
+lib:
+let
+  inherit (import ../../../lib/pkg-lists.nix lib) topLevel scoped;
+in
+{
   # efmls-configs tools that have no corresponding nixpkgs package
   unpackaged = [
     "blade_formatter"
@@ -28,20 +32,6 @@ lib: {
 
   # Mapping from a efmls-configs tool name to the corresponding nixpkgs package
   packaged =
-    let
-      # TODO: move these helpers to a shared location so that none-ls can also use them
-      topLevel = names: lib.genAttrs names lib.id;
-      scoped = lib.concatMapAttrs (
-        scope: v:
-        if builtins.isAttrs v then
-          lib.mapAttrs (_: loc: [ scope ] ++ loc) (scoped v)
-        else
-          lib.genAttrs (lib.toList v) (name: [
-            scope
-            name
-          ])
-      );
-    in
     # Top-level packages
     topLevel [
       "actionlint"
diff --git a/plugins/none-ls/packages.nix b/plugins/none-ls/packages.nix
index dcbac9e3..f5cb37c9 100644
--- a/plugins/none-ls/packages.nix
+++ b/plugins/none-ls/packages.nix
@@ -1,4 +1,8 @@
-lib: {
+lib:
+let
+  inherit (import ../../lib/pkg-lists.nix lib) topLevel scoped nullAttrs;
+in
+{
   # builtin sources that don't require a package
   noPackage = [
     "gitrebase"
@@ -20,7 +24,7 @@ lib: {
   # nixpkgs packages for a given source
   packaged =
     # Top-level packages
-    lib.genAttrs [
+    topLevel [
       "actionlint"
       "alejandra"
       "asmfmt"
@@ -94,29 +98,20 @@ lib: {
       "yapf"
       "zprint"
       "zsh"
-    ] lib.id
+    ]
     # Scoped packages
-    //
-      lib.concatMapAttrs
-        (
-          scope: names:
-          lib.genAttrs names (name: [
-            scope
-            name
-          ])
-        )
-        {
-          nodePackages = [
-            "alex"
-            "prettier"
-          ];
-          phpPackages = [
-            "phpmd"
-            "phpstan"
-          ];
-          rubyPackages = [ "htmlbeautifier" ];
-          ocamlPackages = [ "ocamlformat" ];
-        }
+    // scoped {
+      nodePackages = [
+        "alex"
+        "prettier"
+      ];
+      phpPackages = [
+        "phpmd"
+        "phpstan"
+      ];
+      rubyPackages = "htmlbeautifier";
+      ocamlPackages = "ocamlformat";
+    }
     # Packages where the name is different
     // {
       ansiblelint = "ansible-lint";
@@ -229,7 +224,7 @@ lib: {
       xmllint = "libxml2";
     }
     # builtin sources that are not packaged in nixpkgs
-    // lib.genAttrs [
+    // nullAttrs [
       "blade_formatter"
       "bsfmt"
       "bslint"
@@ -268,5 +263,5 @@ lib: {
       "textlint"
       "twigcs"
       "vacuum"
-    ] (_: null);
+    ];
 }