diff --git a/30-vm-test/README.md b/30-vm-test/README.md
new file mode 100644
index 0000000..3884a63
--- /dev/null
+++ b/30-vm-test/README.md
@@ -0,0 +1,5 @@
+# Testing Nixos VMs
+
+- run `nix run .#vm` to drop down in the VM
+- run `sudo poweroff` to exit the VM
+- run `nix build .#test` to run tests on the VM
diff --git a/30-vm-test/flake.lock b/30-vm-test/flake.lock
index 85df161..3c9b252 100644
--- a/30-vm-test/flake.lock
+++ b/30-vm-test/flake.lock
@@ -9,7 +9,7 @@
       },
       "locked": {
         "lastModified": 1,
-        "narHash": "sha256-SK7iM9bhSrQEJ8ltDJIL3VbM5mbnaRMiN4P7GXMaDfw=",
+        "narHash": "sha256-K/eXRI+U2bC3PIX7kvC/yj7jbDzhpsZr/kX37YEyFpA=",
         "path": "./svc",
         "type": "path"
       },
@@ -33,6 +33,21 @@
         "type": "github"
       }
     },
+    "crane_2": {
+      "locked": {
+        "lastModified": 1729741221,
+        "narHash": "sha256-8AHZZXs1lFkERfBY0C8cZGElSo33D/et7NKEpLRmvzo=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "f235b656ee5b2bfd6d94c3bfd67896a575d4a6ed",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
@@ -51,40 +66,92 @@
         "type": "github"
       }
     },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1726560853,
+        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1729449015,
-        "narHash": "sha256-Gf04dXB0n4q0A9G5nTGH3zuMGr6jtJppqdeljxua1fo=",
+        "lastModified": 1729665710,
+        "narHash": "sha256-AlcmCXJZPIlO5dmFzV3V2XF6x/OpNWUV8Y/FMPGd8Z4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "89172919243df199fe237ba0f776c3e3e3d72367",
+        "rev": "2768c7d042a37de65bb1b5b3268fc987e534c49d",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-24.05",
+        "ref": "nixos-unstable",
         "type": "indirect"
       }
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1729691686,
-        "narHash": "sha256-BAuPWW+9fa1moZTU+jFh+1cUtmsuF8asgzFwejM4wac=",
+        "lastModified": 1729665710,
+        "narHash": "sha256-AlcmCXJZPIlO5dmFzV3V2XF6x/OpNWUV8Y/FMPGd8Z4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2768c7d042a37de65bb1b5b3268fc987e534c49d",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1729665710,
+        "narHash": "sha256-AlcmCXJZPIlO5dmFzV3V2XF6x/OpNWUV8Y/FMPGd8Z4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "32e940c7c420600ef0d1ef396dc63b04ee9cad37",
+        "rev": "2768c7d042a37de65bb1b5b3268fc987e534c49d",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-24.05",
+        "ref": "nixos-unstable",
         "type": "indirect"
       }
     },
+    "openglStuff": {
+      "inputs": {
+        "crane": "crane_2",
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs_3",
+        "rust-overlay": "rust-overlay_2"
+      },
+      "locked": {
+        "lastModified": 1,
+        "narHash": "sha256-ZDamKIbWWAE7utlKMUE/GpHaAB7/Ia9xL7Ju9o5TZ50=",
+        "path": "./vsiles-gl",
+        "type": "path"
+      },
+      "original": {
+        "path": "./vsiles-gl",
+        "type": "path"
+      }
+    },
     "root": {
       "inputs": {
         "axumServer": "axumServer",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_2",
+        "openglStuff": "openglStuff"
       }
     },
     "rust-overlay": {
@@ -108,6 +175,27 @@
         "type": "github"
       }
     },
+    "rust-overlay_2": {
+      "inputs": {
+        "nixpkgs": [
+          "openglStuff",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1729823394,
+        "narHash": "sha256-RiinJqorqSLKh1oSpiMHnBe6nQdJzE45lX6fSnAuDnI=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "7e52e80f5faa374ad4c607d62c6d362589cb523f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
     "systems": {
       "locked": {
         "lastModified": 1681028828,
@@ -122,6 +210,21 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/30-vm-test/flake.nix b/30-vm-test/flake.nix
index 944bce3..19bec03 100644
--- a/30-vm-test/flake.nix
+++ b/30-vm-test/flake.nix
@@ -1,26 +1,47 @@
 {
   description = "Test VM";
   inputs = {
-    nixpkgs.url = "nixpkgs/nixos-24.05";
+    nixpkgs.url = "nixpkgs/nixos-unstable";
     axumServer = {
       url = "path:./svc";
     };
+    openglStuff = {
+      url = "path:./vsiles-gl";
+    };
   };
   outputs =
     {
       self,
       nixpkgs,
       axumServer,
+      openglStuff,
     }:
     let
       my_modules = [
         ./base.nix
         ./vm.nix
         ./svc-module.nix
+        ./opengl-module.nix
+      ];
+      openglStuffOverlay =
+        final: prev:
+        {
+
+          vsiles-gl = prev.vsiles-gl.overrideAttrs (oldAttrs: {
+            nativeBuildInputs = oldAttrs.nativeBuildInputs ++ [ prev.mesa.llvmpipeHook ];
+          });
+        };
+      overlayApply =
+        pkgs:
+        ((pkgs.extend axumServer.overlays.default).extend openglStuff.overlays.default).extend openglStuffOverlay;
+      linux-pkgs = overlayApply nixpkgs.legacyPackages.x86_64-linux;
+      darwin-pkgs = overlayApply nixpkgs.legacyPackages.aarch64-darwin;
+      linux-guest-pkgs = overlayApply nixpkgs.legacyPackages.aarch64-linux;
+      myOverlays = [
+        axumServer.overlays.default
+        openglStuff.overlays.default
+        openglStuffOverlay
       ];
-      linux-pkgs = nixpkgs.legacyPackages.x86_64-linux.extend axumServer.overlays.default;
-      darwin-pkgs = nixpkgs.legacyPackages.aarch64-darwin.extend axumServer.overlays.default;
-      linux-guest-pkgs = nixpkgs.legacyPackages.aarch64-linux.extend axumServer.overlays.default;
       tester =
         {
           host-pkgs,
@@ -49,7 +70,7 @@
             result = machine.succeed("ps aux | grep svc")
             print(result)
             # Testing GET
-            result = machine.succeed("${guest-pkgs.curl}/bin/curl http://localhost:3000 -X GET")
+            result = machine.succeed("${guest-pkgs.curl}/bin/curl -X GET http://localhost:3000")
             assert result == "Hello, You!"
 
           '';
@@ -59,7 +80,7 @@
       nixosConfigurations.linuxVM = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         modules = [
-          { nixpkgs.overlays = [ axumServer.overlays.default ]; }
+          { nixpkgs.overlays = myOverlays; }
         ] ++ my_modules;
       };
       packages.x86_64-linux.vm = self.nixosConfigurations.linuxVM.config.system.build.vm;
@@ -72,7 +93,7 @@
       nixosConfigurations.darwinVM = nixpkgs.lib.nixosSystem {
         system = "aarch64-linux";
         modules = [
-          { nixpkgs.overlays = [ axumServer.overlays.default ]; }
+          { nixpkgs.overlays = myOverlays; }
           # This VM will use the host /nix/store thus avoid 'Exec format error'
           { virtualisation.vmVariant.virtualisation.host.pkgs = darwin-pkgs; }
         ] ++ my_modules;
diff --git a/30-vm-test/opengl-module.nix b/30-vm-test/opengl-module.nix
new file mode 100644
index 0000000..f99832d
--- /dev/null
+++ b/30-vm-test/opengl-module.nix
@@ -0,0 +1,19 @@
+ { config, pkgs, ... }:
+    let
+      vsiles-gl = pkgs.vsiles-gl;
+      vsiles-setup = pkgs.writeShellScriptBin "vsiles-setup" ''
+        set -x
+        Xvfb :99 -ac -noreset +extension GLX +extension RANDR +extension RENDER +render -screen 0 3840x2160x24 -nolisten tcp -nolisten unix
+      '';
+    in
+{
+  environment.systemPackages = [
+    vsiles-gl
+    pkgs.glxinfo
+    pkgs.xorg.xorgserver
+    vsiles-setup
+  ];
+}
+
+# DISPLAY=:99 glxinfox
+
diff --git a/30-vm-test/svc/flake.nix b/30-vm-test/svc/flake.nix
index 66a364b..a6aae50 100644
--- a/30-vm-test/svc/flake.nix
+++ b/30-vm-test/svc/flake.nix
@@ -2,7 +2,7 @@
   description = "A Rust server with Axum and a curl script";
 
   inputs = {
-    nixpkgs.url = "nixpkgs/nixos-24.05";
+    nixpkgs.url = "nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
     rust-overlay.url = "github:oxalica/rust-overlay";
     rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
diff --git a/30-vm-test/vsiles-gl/Cargo.lock b/30-vm-test/vsiles-gl/Cargo.lock
new file mode 100644
index 0000000..b2e1fc5
--- /dev/null
+++ b/30-vm-test/vsiles-gl/Cargo.lock
@@ -0,0 +1,1130 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
+[[package]]
+name = "adler2"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "512761e0bb2578dd7380c6baaa0f4ce03e84f95e960231d1dec8bf4d7d6e2627"
+
+[[package]]
+name = "aligned-vec"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4aa90d7ce82d4be67b64039a3d588d38dbcc6736577de4a847025ce5b0c468d1"
+
+[[package]]
+name = "anyhow"
+version = "1.0.91"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c042108f3ed77fd83760a5fd79b53be043192bb3b9dba91d8c574c0ada7850c8"
+
+[[package]]
+name = "arbitrary"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d5a26814d8dcb93b0e5a0ff3c6d80a8843bafb21b39e8e18a6f05471870e110"
+
+[[package]]
+name = "arg_enum_proc_macro"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ae92a5119aa49cdbcf6b9f893fe4e1d98b04ccbf82ee0584ad948a44a734dea"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "arrayvec"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
+
+[[package]]
+name = "autocfg"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
+
+[[package]]
+name = "av1-grain"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6678909d8c5d46a42abcf571271e15fdbc0a225e3646cf23762cd415046c78bf"
+dependencies = [
+ "anyhow",
+ "arrayvec",
+ "log",
+ "nom",
+ "num-rational",
+ "v_frame",
+]
+
+[[package]]
+name = "avif-serialize"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e335041290c43101ca215eed6f43ec437eb5a42125573f600fc3fa42b9bddd62"
+dependencies = [
+ "arrayvec",
+]
+
+[[package]]
+name = "bit_field"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc827186963e592360843fb5ba4b973e145841266c1357f7180c43526f2e5b61"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bitstream-io"
+version = "2.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b81e1519b0d82120d2fd469d5bfb2919a9361c48b02d82d04befc1cdd2002452"
+
+[[package]]
+name = "built"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c360505aed52b7ec96a3636c3f039d99103c37d1d9b4f7a8c743d3ea9ffcd03b"
+
+[[package]]
+name = "bumpalo"
+version = "3.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
+
+[[package]]
+name = "bytemuck"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8334215b81e418a0a7bdb8ef0849474f40bb10c8b71f1c4ed315cff49f32494d"
+
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
+[[package]]
+name = "byteorder-lite"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
+
+[[package]]
+name = "cc"
+version = "1.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2e7962b54006dcfcc61cb72735f4d89bb97061dd6a7ed882ec6b8ee53714c6f"
+dependencies = [
+ "jobserver",
+ "libc 0.2.161",
+ "shlex",
+]
+
+[[package]]
+name = "cfg-expr"
+version = "0.15.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d067ad48b8650848b989a59a86c6c36a995d02d2bf778d45c3c5d57bc2718f02"
+dependencies = [
+ "smallvec",
+ "target-lexicon",
+]
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "color_quant"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
+
+[[package]]
+name = "crc32fast"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "613f8cc01fe9cf1a3eb3d7f488fd2fa8388403e97039e2f73692932e291a770d"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22ec99545bb0ed0ea7bb9b8e1e9122ea386ff8a48c0922e43f36d45ab09e0e80"
+
+[[package]]
+name = "crunchy"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
+
+[[package]]
+name = "egl"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a373bc9844200b1ff15bd1b245931d1c20d09d06e4ec09f361171f29a4b0752d"
+dependencies = [
+ "khronos",
+ "libc 0.2.161",
+]
+
+[[package]]
+name = "either"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
+
+[[package]]
+name = "equivalent"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
+
+[[package]]
+name = "exr"
+version = "1.72.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "887d93f60543e9a9362ef8a21beedd0a833c5d9610e18c67abe15a5963dcb1a4"
+dependencies = [
+ "bit_field",
+ "flume",
+ "half",
+ "lebe",
+ "miniz_oxide 0.7.4",
+ "rayon-core",
+ "smallvec",
+ "zune-inflate",
+]
+
+[[package]]
+name = "fdeflate"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8090f921a24b04994d9929e204f50b498a33ea6ba559ffaa05e04f7ee7fb5ab"
+dependencies = [
+ "simd-adler32",
+]
+
+[[package]]
+name = "flate2"
+version = "1.0.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1b589b4dc103969ad3cf85c950899926ec64300a1a46d76c03a6072957036f0"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide 0.8.0",
+]
+
+[[package]]
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+dependencies = [
+ "lock_api",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.85"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5023162dfcd14ef8f32034d8bcd4cc5ddc61ef7a247c024a33e24e1f24d21b56"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "system-deps"
+version = "6.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3e535eb8dded36d55ec13eddacd30dec501792ff23a0b1682c38601b8cf2349"
+dependencies = [
+ "cfg-expr",
+ "heck",
+ "pkg-config",
+ "toml",
+ "version-compare",
+]
+
+[[package]]
+name = "target-lexicon"
+version = "0.12.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61c41af27dd6d1e27b1b16b489db798443478cef1f06a660c96db617ba5de3b1"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d11abd9594d9b38965ef50805c5e469ca9cc6f197f883f717e0269a3057b3d5"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.65"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae71770322cbd277e69d762a16c444af02aa0575ac0d174f0b9562d3b37f8602"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tiff"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba1310fcea54c6a9a4fd1aad794ecc02c31682f6bfbecdf460bf19533eed1e3e"
+dependencies = [
+ "flate2",
+ "jpeg-decoder",
+ "weezl",
+]
+
+[[package]]
+name = "toml"
+version = "0.8.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1ed1f98e3fdc28d6d910e6737ae6ab1a93bf1985935a1193e68f93eeb68d24e"
+dependencies = [
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_edit",
+]
+
+[[package]]
+name = "toml_datetime"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0dd7358ecb8fc2f8d014bf86f6f638ce72ba252a2c3a2572f2a795f1d23efb41"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.22.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ae48d6208a266e853d946088ed816055e556cc6028c5e8e2b84d9fa5dd7c7f5"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "winnow",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e91b56cd4cadaeb79bbf1a5645f6b4f8dc5bde8834ad5894a8db35fda9efa1fe"
+
+[[package]]
+name = "v_frame"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6f32aaa24bacd11e488aa9ba66369c7cd514885742c9fe08cfe85884db3e92b"
+dependencies = [
+ "aligned-vec",
+ "num-traits",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "version-compare"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "852e951cb7832cb45cb1169900d19760cfa39b82bc0ea9c0e5a14ae88411c98b"
+
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
+[[package]]
+name = "vsiles-gl"
+version = "0.1.0"
+dependencies = [
+ "egl",
+ "glow",
+ "image",
+]
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "128d1e363af62632b8eb57219c8fd7877144af57558fb2ef0368d0087bddeb2e"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb6dd4d3ca0ddffd1dd1c9c04f94b868c37ff5fac97c30b97cff2d74fce3a358"
+dependencies = [
+ "bumpalo",
+ "log",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e79384be7f8f5a9dd5d7167216f022090cf1f9ec128e6e6a482a2cb5c5422c56"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26c6ab57572f7a24a4985830b120de1594465e5d500f24afe89e16b4e833ef68"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65fc09f10666a9f147042251e0dda9c18f166ff7de300607007e96bdebc1068d"
+
+[[package]]
+name = "web-sys"
+version = "0.3.72"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6488b90108c040df0fe62fa815cbdee25124641df01814dd7282749234c6112"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "weezl"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53a85b86a771b1c87058196170769dd264f66c0782acf1ae6cc51bfd64b39082"
+
+[[package]]
+name = "winnow"
+version = "0.6.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36c1fec1a2bb5866f07c25f68c26e565c4c200aebb96d7e55710c19d3e8ac49b"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
+dependencies = [
+ "byteorder",
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "zune-core"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f423a2c17029964870cfaabb1f13dfab7d092a62a29a89264f4d36990ca414a"
+
+[[package]]
+name = "zune-inflate"
+version = "0.2.54"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73ab332fe2f6680068f3582b16a24f90ad7096d5d39b974d1c0aff0125116f02"
+dependencies = [
+ "simd-adler32",
+]
+
+[[package]]
+name = "zune-jpeg"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16099418600b4d8f028622f73ff6e3deaabdff330fb9a2a131dea781ee8b0768"
+dependencies = [
+ "zune-core",
+]
diff --git a/30-vm-test/vsiles-gl/Cargo.toml b/30-vm-test/vsiles-gl/Cargo.toml
new file mode 100644
index 0000000..0b71d7b
--- /dev/null
+++ b/30-vm-test/vsiles-gl/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "vsiles-gl"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+egl = "0.2.7"
+glow = "0.15.0"
+image = "0.25.4"
diff --git a/30-vm-test/vsiles-gl/flake.lock b/30-vm-test/vsiles-gl/flake.lock
new file mode 100644
index 0000000..ec7a2c9
--- /dev/null
+++ b/30-vm-test/vsiles-gl/flake.lock
@@ -0,0 +1,97 @@
+{
+  "nodes": {
+    "crane": {
+      "locked": {
+        "lastModified": 1729741221,
+        "narHash": "sha256-8AHZZXs1lFkERfBY0C8cZGElSo33D/et7NKEpLRmvzo=",
+        "owner": "ipetkov",
+        "repo": "crane",
+        "rev": "f235b656ee5b2bfd6d94c3bfd67896a575d4a6ed",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ipetkov",
+        "repo": "crane",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1726560853,
+        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1729665710,
+        "narHash": "sha256-AlcmCXJZPIlO5dmFzV3V2XF6x/OpNWUV8Y/FMPGd8Z4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2768c7d042a37de65bb1b5b3268fc987e534c49d",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "crane": "crane",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1729823394,
+        "narHash": "sha256-RiinJqorqSLKh1oSpiMHnBe6nQdJzE45lX6fSnAuDnI=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "7e52e80f5faa374ad4c607d62c6d362589cb523f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/30-vm-test/vsiles-gl/flake.nix b/30-vm-test/vsiles-gl/flake.nix
new file mode 100644
index 0000000..e3d5e9c
--- /dev/null
+++ b/30-vm-test/vsiles-gl/flake.nix
@@ -0,0 +1,57 @@
+{
+  description = "A Rust simple opengl progra";
+
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
+    crane.url = "github:ipetkov/crane";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+      rust-overlay,
+      crane,
+    }:
+    let
+      perSystemOutputs = flake-utils.lib.eachDefaultSystem (
+        system:
+        let
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [ rust-overlay.overlays.default ];
+          };
+          lib = pkgs.lib;
+          craneLib = crane.mkLib pkgs;
+          src = craneLib.cleanCargoSource ./.;
+          buildInputs = [ pkgs.mesa pkgs.libGL ] ++ lib.optionals pkgs.stdenv.isDarwin [ pkgs.libiconv ];
+          commonArgs = {
+            inherit src;
+            strictDeps = true;
+            inherit buildInputs;
+            nativeBuildInputs = [
+              pkgs.pkg-config
+              pkgs.mesa.llvmpipeHook
+            ];
+          };
+          cargoArtifacts = craneLib.buildDepsOnly commonArgs;
+          vsiles-gl = craneLib.buildPackage (commonArgs // { inherit cargoArtifacts; });
+
+        in
+        {
+          packages.vsiles-gl = vsiles-gl;
+          packages.default = vsiles-gl;
+        }
+      );
+    in
+    perSystemOutputs
+    // {
+      overlays.default = final: prev: {
+        vsiles-gl = perSystemOutputs.packages.${final.stdenv.system}.vsiles-gl;
+      };
+    };
+}
diff --git a/30-vm-test/vsiles-gl/src/main.rs b/30-vm-test/vsiles-gl/src/main.rs
new file mode 100644
index 0000000..47cd09c
--- /dev/null
+++ b/30-vm-test/vsiles-gl/src/main.rs
@@ -0,0 +1,83 @@
+use glow::HasContext;
+use image::{ImageBuffer, Rgba};
+use std::fs::File;
+use std::io::BufWriter;
+
+fn main() {
+    // Initialize the OpenGL context with EGL (supports off-screen on macOS)
+    let (gl, _egl_context) = unsafe {
+        let egl_display =
+            egl::get_display(egl::EGL_DEFAULT_DISPLAY).expect("Failed to get EGL display");
+        let mut major = 0;
+        let mut minor = 0;
+        let result = egl::initialize(egl_display, &mut major, &mut minor);
+        println!("egl::initialize: {result}");
+
+        let config = egl::choose_config(
+            egl_display,
+            &[
+                egl::EGL_RED_SIZE,
+                8,
+                egl::EGL_GREEN_SIZE,
+                8,
+                egl::EGL_BLUE_SIZE,
+                8,
+                egl::EGL_NONE,
+            ],
+            1,
+        )
+        .expect("Failed to choose EGL config");
+        let egl_context = egl::create_context(
+            egl_display,
+            config,
+            egl::EGL_NO_CONTEXT,
+            &[egl::EGL_CONTEXT_CLIENT_VERSION, 2, egl::EGL_NONE],
+        )
+        .expect("Failed to create EGL context");
+
+        let egl_surface = egl::create_pbuffer_surface(
+            egl_display,
+            config,
+            &[egl::EGL_WIDTH, 256, egl::EGL_HEIGHT, 256, egl::EGL_NONE],
+        )
+        .expect("Failed to create EGL pbuffer surface");
+
+        let result = egl::make_current(egl_display, egl_surface, egl_surface, egl_context);
+        println!("egl::make_current = {result}");
+
+        let gl = glow::Context::from_loader_function(|s| egl::get_proc_address(s) as *const _);
+        (gl, egl_context)
+    };
+
+    // Set up OpenGL framebuffer and buffer size.
+    let width = 256;
+    let height = 256;
+
+    unsafe {
+        gl.clear_color(0.2, 0.3, 0.3, 1.0);
+        gl.clear(glow::COLOR_BUFFER_BIT);
+    }
+
+    // Read pixels from the framebuffer into a buffer.
+    let mut pixels = vec![0u8; (width * height * 4) as usize];
+    unsafe {
+        gl.read_pixels(
+            0,
+            0,
+            width as i32,
+            height as i32,
+            glow::RGBA,
+            glow::UNSIGNED_BYTE,
+            glow::PixelPackData::Slice(&mut pixels),
+        );
+    }
+
+    // Convert buffer into an image and save it as a PNG.
+    let buffer: ImageBuffer<Rgba<u8>, _> =
+        ImageBuffer::from_raw(width, height, pixels).expect("Failed to create image buffer");
+    let file = File::create("output.png").expect("Failed to create output file");
+    let mut writer = BufWriter::new(file);
+    buffer
+        .write_to(&mut writer, image::ImageFormat::Png)
+        .expect("Failed to write PNG");
+}