diff --git a/nixos/modules/programs/chromium.nix b/nixos/modules/programs/chromium.nix
index 41c49db8c71..16c063ebc89 100644
--- a/nixos/modules/programs/chromium.nix
+++ b/nixos/modules/programs/chromium.nix
@@ -9,9 +9,7 @@ let
     HomepageLocation = cfg.homepageLocation;
     DefaultSearchProviderSearchURL = cfg.defaultSearchProviderSearchURL;
     DefaultSearchProviderSuggestURL = cfg.defaultSearchProviderSuggestURL;
-    ExtensionInstallForcelist = map (extension:
-      "${extension};https://clients2.google.com/service/update2/crx"
-    ) cfg.extensions;
+    ExtensionInstallForcelist = cfg.extensions;
   };
 in
 
@@ -28,7 +26,11 @@ in
           List of chromium extensions to install.
           For list of plugins ids see id in url of extensions on
           <link xlink:href="https://chrome.google.com/webstore/category/extensions">chrome web store</link>
-          page.
+          page. To install a chromium extension not included in the chrome web
+          store, append to the extension id a semicolon ";" followed by a URL
+          pointing to an Update Manifest XML file. See
+          <link xlink:href="https://www.chromium.org/administrators/policy-list-3#ExtensionInstallForcelist">ExtensionInstallForcelist</link>
+          for additional details.
         '';
         default = [];
         example = literalExample ''