chore: remove sourcesWith fn, using lib.fileset

lib/default.nix

@@ -2,17 +2,4 @@
   types = import ./types.nix {inherit yants;};
 in {
   mkNeovimPkg = import ./mkNeovimPkg.nix {inherit version types;};
-
-  sourcesWith = path: paths: let
-    samePath = a: let a' = builtins.toString a; in b: a' == builtins.toString b;
-    isRoot = samePath "/";
-    isInPath = path: subPath:
-      if isRoot subPath
-      then false
-      else (samePath path subPath) || (isInPath path (builtins.dirOf subPath));
-    filter = src: _type: builtins.any (includePath: isInPath includePath src) paths;
-  in
-    builtins.path {
-      inherit path filter;
-    };
 }

lib/deps.nix

@@ -122,16 +122,13 @@
     vimUtils.buildVimPlugin {
       inherit version;
       pname = "sloth-flake";
-      src = ../lua/sloth-flake;
+      src = with lib.fileset;
+        toSource {
+          root = ../.;
+          fileset = ../lua/sloth-flake;
+        };
       buildPhase = ''
         dir=lua/sloth-flake
-        mkdir -p $dir
-        mv *.lua $dir
-        for d in *; do
-          if [[ -d "$d" ]] && [[ "$d" != 'lua' ]]; then
-            mv "$d" $dir
-          fi
-        done
 
         cat <<'LUA' > $dir/dependencies.lua
         ${pluginsLuaDef plugins}