diff --git a/nix/home.nix b/nix/home.nix
index 30552d9..f5955d1 100644
--- a/nix/home.nix
+++ b/nix/home.nix
@@ -79,5 +79,7 @@
   nix = {
     package = pkgs.nix;
     settings.experimental-features = ["nix-command" "flakes"];
+    settings.max-jobs = "auto";
+    gc.automatic = true;
   };
 }
diff --git a/nix/latex.nix b/nix/latex.nix
index adf41c2..5f839ca 100644
--- a/nix/latex.nix
+++ b/nix/latex.nix
@@ -6,6 +6,13 @@
   home.packages = with pkgs; [
     texliveMedium
   ];
+  home.file = {
+    ".latexmkrc".text = ''
+      $dvi_previewer = 'xdvi -watchfile 1.5';
+      $ps_previewer  = 'zathura';
+      $pdf_previewer = 'zathura';
+    '';
+  };
   home.shellAliases = {
     pdfmk = "latexmk -lualatex -pvc";
   };
diff --git a/nix/nvim/cmp/cmp.nix b/nix/nvim/cmp/cmp.nix
index 0de1892..f49ea98 100644
--- a/nix/nvim/cmp/cmp.nix
+++ b/nix/nvim/cmp/cmp.nix
@@ -21,7 +21,7 @@
           {name = "spell";}
         ];
         snippet = {
-          expand = "luasnip";
+          expand = "function(args) require('luasnip').lsp_expand(args.body) end";
         };
         mapping = {
           "<C-Space>" = "cmp.mapping.complete()";
diff --git a/nix/nvim/lsp/clang-format b/nix/nvim/lsp/clang-format
deleted file mode 100644
index 2c61359..0000000
--- a/nix/nvim/lsp/clang-format
+++ /dev/null
@@ -1,14 +0,0 @@
----
-#this syncronizes with settings used by neovims treesitters so that the lsp formatting and treesitter formatting do not fight eatch other.
-PointerAlignment: Left
-ColumnLimit: 80
-IndentWidth: 4
-TabWidth: 4
-UseCRLF: false
-UseTab: Never
-AlignAfterOpenBracket: BlockIndent
-AlwaysBreakBeforeMultilineStrings: true
-BreakBeforeBraces: Attach
-AlignOperands: Align
-BreakBeforeBinaryOperators: NonAssignment
-...
diff --git a/nix/nvim/lsp/clang-format-work b/nix/nvim/lsp/clang-format-work
deleted file mode 100644
index feaaf21..0000000
--- a/nix/nvim/lsp/clang-format-work
+++ /dev/null
@@ -1,13 +0,0 @@
----
-#this syncronizes with settings used by neovims treesitters so that the lsp formatting and treesitter formatting do not fight eatch other.
-PointerAlignment: Left
-ColumnLimit: 80
-IndentWidth: 4
-TabWidth: 4
-UseCRLF: false
-UseTab: Never
-AlignAfterOpenBracket: BlockIndent
-AlwaysBreakBeforeMultilineStrings: true
-BreakBeforeBraces: Allman
-BreakBeforeBinaryOperators: None
-...
diff --git a/nix/nvim/lsp/clangd b/nix/nvim/lsp/clangd
deleted file mode 100644
index 1211c5c..0000000
--- a/nix/nvim/lsp/clangd
+++ /dev/null
@@ -1,5 +0,0 @@
-# keeps clangd from choking when it sees a compiler flag for a different
-# compiler. (sutch as when acting as an lsp for a project that uses GCC.)
-CompileFlags:
-  Add: -Wno-unknown-warning-option
-  Remove: [-m*, -f*]