diff --git a/flake.lock b/flake.lock
index f14be3103..17615dd77 100644
--- a/flake.lock
+++ b/flake.lock
@@ -369,11 +369,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1624890984,
-        "narHash": "sha256-RMQtTm4OoEc8BHWk4/Yfu1y4uHlG4HCP+DeC0J0zGqQ=",
+        "lastModified": 1627523399,
+        "narHash": "sha256-j9CgnUQpWcb8OB4LRzPW8BdxvmoROJptgptDlPA8Heo=",
         "owner": "berberman",
         "repo": "nvfetcher",
-        "rev": "d3efa8c58057dbcc1565dca3105d31d9f25fd5ca",
+        "rev": "fb8f2cc770ad3dd3e29d7ba3004692d4d53fba9b",
         "type": "github"
       },
       "original": {
diff --git a/pkgs/_sources/generated.nix b/pkgs/_sources/generated.nix
index 0d13ac01e..ff97a43b4 100644
--- a/pkgs/_sources/generated.nix
+++ b/pkgs/_sources/generated.nix
@@ -1,6 +1,17 @@
 # This file was generated by nvfetcher, please do not modify it manually.
 { fetchgit, fetchurl }:
 {
+  dotenv = {
+    pname = "dotenv";
+    version = "1.0.1";
+    src = fetchurl {
+      url = "https://open-vsx.org/api/mikestead/dotenv/1.0.1/file/mikestead.dotenv-1.0.1.vsix";
+      sha256 = "1ilp720bakyqwb29cxs1k7xsbqlill5j8dnk6bm839xzdvy394sk";
+    };
+    homepage = "https://github.com/mikestead/vscode-dotenv";
+    license = "mit";
+    description = "Support for dotenv file syntax";
+  };
   manix = {
     pname = "manix";
     version = "d08e7ca185445b929f097f8bfb1243a8ef3e10e4";
@@ -12,6 +23,25 @@
       leaveDotGit = false;
       sha256 = "1b7xi8c2drbwzfz70czddc4j33s7g1alirv12dwl91hbqxifx8qs";
     };
-
+  };
+  nixpkgs-fmt = {
+    pname = "nixpkgs-fmt";
+    version = "0.0.1";
+    src = fetchurl {
+      url = "https://B4dM4n.gallery.vsassets.io/_apis/public/gallery/publisher/B4dM4n/extension/nixpkgs-fmt/0.0.1/assetbyname/Microsoft.VisualStudio.Services.VSIXPackage";
+      sha256 = "1gvjqy54myss4w1x55lnyj2l887xcnxc141df85ikmw1gr9s8gdz";
+    };
+    license = "mit";
+  };
+  rust = {
+    pname = "rust";
+    version = "0.7.8";
+    src = fetchurl {
+      url = "https://open-vsx.org/api/rust-lang/rust/0.7.8/file/rust-lang.rust-0.7.8.vsix";
+      sha256 = "02mpqpyk6aid6s7byqzh8s1fd2mgzcpl2rpyri0fgakc67bsnyz6";
+    };
+    homepage = "https://github.com/rust-lang/rls-vscode";
+    license = "[ \"mit\", \"asl20\" ]";
+    description = "Rust for Visual Studio Code (powered by Rust Language Server/Rust Analyzer). Provides lints, code completion and navigation, formatting and more.";
   };
 }
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 924a2300c..8eb07da08 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -2,4 +2,8 @@ final: prev: {
   # keep sources this first
   sources = prev.callPackage (import ./_sources/generated.nix) { };
   # then, call packages with `final.callPackage`
+
+  vscode-utils = prev.vscode-utils // (prev.callPackage ./misc/vscode-extensions/vscode-utils.nix { });
+
+  vscode-extensions = prev.vscode-extensions // (final.callPackage ./misc/vscode-extensions { });
 }
diff --git a/pkgs/misc/vscode-extensions/default.nix b/pkgs/misc/vscode-extensions/default.nix
new file mode 100644
index 000000000..589d751f7
--- /dev/null
+++ b/pkgs/misc/vscode-extensions/default.nix
@@ -0,0 +1,11 @@
+{ lib, vscode-utils, sources }:
+let
+  inherit (vscode-utils) isVscodeExt mkVscodeExtensions;
+
+  vscodeSources = lib.filterAttrs
+    (name: ext: if ext ? src then isVscodeExt ext.src.name else false)
+    sources;
+
+  baseExtensions = mkVscodeExtensions vscodeSources;
+in
+baseExtensions
diff --git a/pkgs/misc/vscode-extensions/vscode-utils.nix b/pkgs/misc/vscode-extensions/vscode-utils.nix
new file mode 100644
index 000000000..640e90cfd
--- /dev/null
+++ b/pkgs/misc/vscode-extensions/vscode-utils.nix
@@ -0,0 +1,94 @@
+{ lib
+, vscode-utils
+, vscode
+, namespace ? false
+}:
+
+with lib;
+
+let
+  isVsix = hasSuffix ".vsix";
+
+  isVsixPackage = hasSuffix ".VSIXPackage";
+
+  isVscodeExt = name: (isVsix name) || (isVsixPackage name);
+
+  isNaiveJSONList = string: (hasPrefix "[" string) && (hasSuffix "]" string);
+
+  toJSONString = string:
+    if isNaiveJSONList string
+    then string
+    else ''"${string}"'';
+
+  mkVscodeExtUniqueId = ext:
+    let uniqueIds =
+      if isVsix ext.src.name
+      then splitString "." (getName ext.src.name)
+      else
+        builtins.match
+          # 1st & 2nd match: publisher
+          # 3rd match: name
+          "https://(.*).gallery.vsassets.io/_apis/public/gallery/publisher/(.*)/extension/(.*)/${ext.version}/assetbyname/Microsoft.VisualStudio.Services.VSIXPackage"
+          (head ext.src.urls);
+    in
+    { publisher = head uniqueIds; pname = last uniqueIds; };
+
+  mkVscodeExtMetaLink = name: publisher: pname: { openVsxPath ? "/", vscodeMarketplacePath ? "/" }:
+    if isVsix name
+    then "https://open-vsx.org/extension/${publisher}/${pname}${openVsxPath}"
+    else "https://marketplace.visualstudio.com/items/${publisher}.${pname}${vscodeMarketplacePath}";
+
+  mkVscodeMetaOption = ext:
+    if isVsix ext.src.name
+    then { inherit (ext) homepage description; }
+    else { };
+
+  mkVscodeExtension = ext: publisher: pname:
+    vscode-utils.buildVscodeExtension ((builtins.removeAttrs ext [ "pname" "src" "version" "homepage" "description" ]) // rec {
+      inherit (ext) version;
+
+      name = "${publisher}-${pname}-${version}";
+
+      vscodeExtUniqueId = "${publisher}.${pname}";
+
+      src = "${publisher}-${pname}.zip";
+
+      preUnpack = ''ln -s "${ext.src}" $src'';
+
+      meta = with lib; {
+        inherit (vscode.meta) platforms;
+        downloadPage = mkVscodeExtMetaLink ext.src.name publisher pname { };
+        changelog = mkVscodeExtMetaLink ext.src.name publisher pname {
+          openVsxPath = "/changes";
+          vscodeMarketplacePath = "/changelog";
+        };
+        license = assert asserts.assertMsg (ext ? license) "Specify a license for ${vscodeExtUniqueId} VS Code extension!";
+          forEach
+            (toList (builtins.fromJSON (toJSONString ext.license)))
+            (license: licenses."${license}");
+        maintainers =
+          if ext ? maintainers
+          then
+            forEach
+              (toList (builtins.fromJSON ext.maintainers))
+              (maintainer: maintainers."${maintainer}")
+          else [ maintainers.danielphan2003 ];
+      } // (mkVscodeMetaOption ext);
+    });
+
+  mkVscodeExtensions = sources:
+    mapAttrs'
+      (name: ext:
+        let inherit (mkVscodeExtUniqueId ext) publisher pname; in
+        nameValuePair
+          "${optionalString namespace "${publisher}."}${name}" # follows user-defined source name
+          (mkVscodeExtension ext publisher pname))
+      sources;
+in
+{
+  inherit
+    isVsix isVscodeExt isVsixPackage
+    mkVscodeExtUniqueId mkVscodeExtMetaLink
+    mkVscodeExtension mkVscodeExtensions
+    ;
+}
diff --git a/pkgs/sources.toml b/pkgs/sources.toml
index f7af168e0..784dc33bd 100644
--- a/pkgs/sources.toml
+++ b/pkgs/sources.toml
@@ -2,3 +2,18 @@
 [manix]
 src.git = "https://github.com/mlvzk/manix"
 fetch.github = "mlvzk/manix"
+
+[dotenv]
+src.openvsx = "mikestead.dotenv"
+fetch.openvsx = "mikestead.dotenv"
+passthru = { license = "mit", homepage = "https://github.com/mikestead/vscode-dotenv", description = "Support for dotenv file syntax" }
+
+[rust]
+src.openvsx = "rust-lang.rust"
+fetch.openvsx = "rust-lang.rust"
+passthru = { license = '[ "mit", "asl20" ]', homepage = "https://github.com/rust-lang/rls-vscode", description = "Rust for Visual Studio Code (powered by Rust Language Server/Rust Analyzer). Provides lints, code completion and navigation, formatting and more." }
+
+[nixpkgs-fmt]
+src.vsmarketplace = "B4dM4n.nixpkgs-fmt"
+fetch.vsmarketplace = "B4dM4n.nixpkgs-fmt"
+passthru = { license = "mit" }