diff --git a/pkgs/applications/editors/vscode/extensions/openvsxExtRefToFetchArgs.nix b/pkgs/applications/editors/vscode/extensions/openvsxExtRefToFetchArgs.nix
new file mode 100644
index 0000000000000..9e9d1f1101f57
--- /dev/null
+++ b/pkgs/applications/editors/vscode/extensions/openvsxExtRefToFetchArgs.nix
@@ -0,0 +1,12 @@
+{ publisher, name, version, arch ? "", sha256 ? "" }:
+let
+  url =
+    if arch == ""
+    then "https://open-vsx.org/api/${publisher}/${name}/${version}/file/${publisher}.${name}-${version}.vsix"
+    else "https://open-vsx.org/api/${publisher}/${name}/${arch}/${version}/file/${publisher}.${name}-${version}.vsix";
+in
+{
+  inherit url;
+  sha256 = sha256;
+  name = "${publisher}-${name}.zip";
+}
diff --git a/pkgs/applications/editors/vscode/extensions/vscode-utils.nix b/pkgs/applications/editors/vscode/extensions/vscode-utils.nix
index 8f0112e5f608a..fc93c3680d7e6 100644
--- a/pkgs/applications/editors/vscode/extensions/vscode-utils.nix
+++ b/pkgs/applications/editors/vscode/extensions/vscode-utils.nix
@@ -45,6 +45,9 @@ let
   fetchVsixFromVscodeMarketplace = mktplcExtRef:
     fetchurl (import ./mktplcExtRefToFetchArgs.nix mktplcExtRef);
 
+  fetchVsixFromOpenVsx = mktplcExtRef:
+    fetchurl (import ./openvsxExtRefToFetchArgs.nix mktplcExtRef);
+
   buildVscodeMarketplaceExtension = a@{
     name ? "",
     src ? null,
@@ -60,6 +63,21 @@ let
     vscodeExtUniqueId = "${mktplcRef.publisher}.${mktplcRef.name}";
   });
 
+  buildOpenVsxExtension = a@{
+    name ? "",
+    src ? null,
+    vsix ? null,
+    mktplcRef,
+    ...
+  }: assert "" == name; assert null == src;
+  buildVscodeExtension ((removeAttrs a [ "mktplcRef" "vsix" ]) // {
+    name = "${mktplcRef.publisher}-${mktplcRef.name}-${mktplcRef.version}";
+    src = if (vsix != null)
+      then vsix
+      else fetchVsixFromOpenVsx mktplcRef;
+    vscodeExtUniqueId = "${mktplcRef.publisher}.${mktplcRef.name}";
+  });
+
   mktplcRefAttrList = [
     "name"
     "publisher"
@@ -73,16 +91,24 @@ let
       mktplcRef = builtins.intersectAttrs (lib.genAttrs mktplcRefAttrList (_: null)) ext;
     });
 
+  openvsxExtRefToExtDrv = ext:
+    buildOpenVsxExtension (removeAttrs ext mktplcRefAttrList // {
+      mktplcRef = builtins.intersectAttrs (lib.genAttrs mktplcRefAttrList (_: null)) ext;
+    });
+
   extensionFromVscodeMarketplace = mktplcExtRefToExtDrv;
   extensionsFromVscodeMarketplace = mktplcExtRefList:
     builtins.map extensionFromVscodeMarketplace mktplcExtRefList;
 
+  extensionFromOpenVsx = openvsxExtRefToExtDrv;
+  extensionsFromOpenVsx = mktplcExtRefList:
+    builtins.map extensionFromOpenVsx mktplcExtRefList;
+
   vscodeWithConfiguration = import ./vscodeWithConfiguration.nix {
    inherit lib extensionsFromVscodeMarketplace writeShellScriptBin;
    vscodeDefault = vscode;
   };
 
-
   vscodeExts2nix = import ./vscodeExts2nix.nix {
     inherit lib writeShellScriptBin;
     vscodeDefault = vscode;
@@ -95,7 +121,9 @@ let
 in
 {
   inherit fetchVsixFromVscodeMarketplace buildVscodeExtension
-          buildVscodeMarketplaceExtension extensionFromVscodeMarketplace
-          extensionsFromVscodeMarketplace
-          vscodeWithConfiguration vscodeExts2nix vscodeEnv;
+    buildVscodeMarketplaceExtension extensionFromVscodeMarketplace
+    extensionsFromVscodeMarketplace
+    vscodeWithConfiguration vscodeExts2nix vscodeEnv;
+  inherit fetchVsixFromOpenVsx buildOpenVsxExtension
+    openvsxExtRefToExtDrv extensionFromOpenVsx;
 }