diff --git a/pkgs/by-name/sh/sharedown/package.nix b/pkgs/by-name/sh/sharedown/package.nix
index 5d8fa6f1c651..7e1f5d71d42d 100644
--- a/pkgs/by-name/sh/sharedown/package.nix
+++ b/pkgs/by-name/sh/sharedown/package.nix
@@ -17,6 +17,13 @@
   chromium,
 }:
 
+let
+  yarnLock = ./yarn.lock;
+  offlineCache = fetchYarnDeps {
+    inherit yarnLock;
+    hash = "sha256-9Mdn18jJTXyAVQMGl9ImIEbzlkK6walPrgkGzupLPFQ=";
+  };
+in
 stdenvNoCC.mkDerivation rec {
   pname = "Sharedown";
   version = "5.3.6";
@@ -24,7 +31,7 @@ stdenvNoCC.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "kylon";
     repo = "Sharedown";
-    tag = version;
+    rev = "3d788aae37a026777d058ed44db07a667fc12be8";
     hash = "sha256-5t/71T/eBg4vkDZTj7mtCkXhS+AuiVhBmx0Zzrry5Lg=";
   };
 
@@ -58,7 +65,12 @@ stdenvNoCC.mkDerivation rec {
 
       modules = yarn2nix-moretea.mkYarnModules rec {
         name = "Sharedown-modules-${version}";
-        inherit pname version;
+        inherit
+          pname
+          version
+          offlineCache
+          yarnLock
+          ;
 
         yarnFlags = [ "--production" ];
 
@@ -93,12 +105,6 @@ stdenvNoCC.mkDerivation rec {
         '';
 
         packageJSON = "${src}/package.json";
-        yarnLock = ./yarn.lock;
-
-        offlineCache = fetchYarnDeps {
-          inherit yarnLock;
-          hash = "sha256-9Mdn18jJTXyAVQMGl9ImIEbzlkK6walPrgkGzupLPFQ=";
-        };
       };
     in
     ''
@@ -121,7 +127,10 @@ stdenvNoCC.mkDerivation rec {
       runHook postInstall
     '';
 
-  passthru.updateScript = ./update.sh;
+  passthru = {
+    inherit offlineCache;
+    updateScript = ./update.sh;
+  };
 
   meta = {
     description = "Application to save your Sharepoint videos for offline usage";
diff --git a/pkgs/by-name/sh/sharedown/update.sh b/pkgs/by-name/sh/sharedown/update.sh
index 574f24c2273c..fc060df4a877 100755
--- a/pkgs/by-name/sh/sharedown/update.sh
+++ b/pkgs/by-name/sh/sharedown/update.sh
@@ -1,24 +1,28 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p common-updater-scripts curl jq yarn yarn2nix-moretea.yarn2nix nodejs
+#!nix-shell -i bash -p common-updater-scripts curl gnugrep jq yarn yarn2nix-moretea.yarn2nix nix-update nodejs
+# See git history for the version of this script that updated to tagged versions.
 
 set -euo pipefail
 
-latestVersion=$(curl ${GITHUB_TOKEN:+-u ":$GITHUB_TOKEN"} -sL "https://api.github.com/repos/kylon/Sharedown/releases/latest" | jq -r '.tag_name')
-currentVersion=$(nix-instantiate --eval --expr 'with import ./. {}; sharedown.version' | tr -d '"')
+nixpkgsDir="$PWD"
 
-if [[ "$currentVersion" == "$latestVersion" && "${BUMP_LOCK-}" != "1" ]]; then
+currentRev=$(nix-instantiate --eval --expr 'with import ./. {}; sharedown.src.rev' | tr -d '"')
+nix-update --version=branch --src-only sharedown
+
+latestRev=$(nix-instantiate --eval --expr 'with import ./. {}; sharedown.src.rev' | tr -d '"')
+dirname="$(realpath "$(dirname "$0")")"
+sourceDir="$(nix-build -A sharedown.src --no-out-link)"
+tempDir="$(mktemp -d)"
+trap 'chmod -R u+w $tempDir && rm -rf $tempDir' EXIT
+
+if [[ "$currentRev" == "$latestRev" && "${BUMP_LOCK-}" != "1" ]]; then
     # Skip update when already on the latest version.
     exit 0
 fi
 
-update-source-version sharedown "$latestVersion"
-
-dirname="$(realpath "$(dirname "$0")")"
-sourceDir="$(nix-build -A sharedown.src --no-out-link)"
-tempDir="$(mktemp -d)"
-
 cp -r "$sourceDir"/* "$tempDir"
 cd "$tempDir"
-PUPPETEER_SKIP_DOWNLOAD=1 yarn install
-yarn2nix >"$dirname/yarndeps.nix"
-cp -r yarn.lock "$dirname"
+PUPPETEER_SKIP_DOWNLOAD=1 yarn install --mode update-lockfile
+cp yarn.lock "$dirname"
+cd "$nixpkgsDir"
+update-source-version sharedown --ignore-same-version --source-key=offlineCache