Properly build the cv using nix

.gitignore

@@ -1,3 +1,4 @@
 *.tuc
 *.log
 *.pdf
+/result

flake.nix

@@ -1,42 +1,45 @@
 {
-  description = "";
+  description = "My CV";
 
   inputs = {
     flake-utils.url = "github:numtide/flake-utils";
   };
 
   outputs = {
+    self,
     nixpkgs,
     flake-utils,
-    ...
   }: let
-    inherit (flake-utils.lib) eachSystem defaultSystems;
+    inherit (flake-utils.lib) eachDefaultSystem;
   in
-    {
-    }
-    // (eachSystem defaultSystems) (system: let
+    eachDefaultSystem (system: let
       pkgs = import nixpkgs {inherit system;};
       inherit (pkgs.lib.strings) concatMapStringsSep;
+      inherit (pkgs.lib.sources) sourceFilesBySuffices;
     in {
-      devShell = pkgs.mkShell {
-        packages = with pkgs; [
-          texlive.combined.scheme-context
-          roboto
-          roboto-slab
-          roboto-mono
-        ];
-        shellHook = let
-          font-path =
-            concatMapStringsSep ";" (pkg: "${pkg}/share/fonts/truetype/")
-            (with pkgs; [
-              roboto
-              roboto-slab
-              roboto-mono
-            ]);
-        in ''
-          export OSFONTDIR='${font-path}'
-          mtxrun --script fonts --reload --force
-        '';
+      packages = {
+        default =
+          pkgs.runCommand "build-cv" {
+            OSFONTDIR =
+              concatMapStringsSep ";" (pkg: "${pkg}/share/fonts/truetype/")
+              (with pkgs; [
+                roboto
+                roboto-slab
+                roboto-mono
+              ]);
+            buildInputs = with pkgs; [
+              texlive.combined.scheme-context
+            ];
+            input = sourceFilesBySuffices self [".tex"];
+          } ''
+            cp ${self}/*.tex .
+            context cv
+            mkdir -p $out
+            cp cv.pdf $out/cv.pdf
+          '';
       };
+      # Legacy nix command support
+      # TODO(tlater): Remove once 22.05 is adopted
+      defaultPackage = self.packages.${system}.default;
     });
 }