diff --git a/pkgs/applications/networking/instant-messengers/schildichat/pin.json b/pkgs/applications/networking/instant-messengers/schildichat/pin.json
index aceeec448fdf..c8f5f30daaf3 100644
--- a/pkgs/applications/networking/instant-messengers/schildichat/pin.json
+++ b/pkgs/applications/networking/instant-messengers/schildichat/pin.json
@@ -1,6 +1,7 @@
 {
-  "version": "1.9.8-sc.1",
-  "srcHash": "1ki4ccsa2i0mv10ypxg6bx9njikipdqkc5bsq5h7bi86scjm4lni",
-  "webYarnHash": "1za6r0snrflh2605xw4m19p88chx19ip8jj592bqjdagildqm50l",
-  "desktopYarnHash": "176ih0nzzx2yds6kp3lzdsrlp0glb9nqw146z0s1az7pjp6nrf18"
+  "version": "1.10.3-sc.0.test.1",
+  "rev": "3a8eecb023c832acc4390d3a51c0940eafb2b3bd",
+  "srcHash": "07amc69ghfz39jbps14ysfql4m42dmzbdjq9hqvzirhqz52mshf3",
+  "webYarnHash": "0knkl8sanqcx0lxjclz6s8vm5wpn8aywx9vydz7lda3l6c2g5zqf",
+  "desktopYarnHash": "0akmgib212gkygvs2snn9c43k3ika3ipg85d480j3hqyb6yxwqmn"
 }
diff --git a/pkgs/applications/networking/instant-messengers/schildichat/schildichat-desktop.nix b/pkgs/applications/networking/instant-messengers/schildichat/schildichat-desktop.nix
index 97117f87c99f..f7e2ee3c6a9f 100644
--- a/pkgs/applications/networking/instant-messengers/schildichat/schildichat-desktop.nix
+++ b/pkgs/applications/networking/instant-messengers/schildichat/schildichat-desktop.nix
@@ -27,7 +27,7 @@ stdenv.mkDerivation rec {
 
   src = fetchgit {
     url = "https://github.com/SchildiChat/schildichat-desktop/";
-    rev = "v${version}";
+    inherit (pinData) rev;
     sha256 = pinData.srcHash;
     fetchSubmodules = true;
   };
diff --git a/pkgs/applications/networking/instant-messengers/schildichat/schildichat-web.nix b/pkgs/applications/networking/instant-messengers/schildichat/schildichat-web.nix
index 96f211de18da..c3860c9f05c3 100644
--- a/pkgs/applications/networking/instant-messengers/schildichat/schildichat-web.nix
+++ b/pkgs/applications/networking/instant-messengers/schildichat/schildichat-web.nix
@@ -20,7 +20,7 @@ in stdenv.mkDerivation rec {
 
   src = fetchgit {
     url = "https://github.com/SchildiChat/schildichat-desktop/";
-    rev = "v${version}";
+    inherit (pinData) rev;
     sha256 = pinData.srcHash;
     fetchSubmodules = true;
   };
diff --git a/pkgs/applications/networking/instant-messengers/schildichat/update.sh b/pkgs/applications/networking/instant-messengers/schildichat/update.sh
index 3f5289de8c4e..7abc0f3322bb 100755
--- a/pkgs/applications/networking/instant-messengers/schildichat/update.sh
+++ b/pkgs/applications/networking/instant-messengers/schildichat/update.sh
@@ -1,24 +1,27 @@
 #!/usr/bin/env nix-shell
 #!nix-shell -I nixpkgs=../../../../../ -i bash -p nix wget prefetch-yarn-deps nix-prefetch-git jq
 
-if [[ "$#" -gt 1 || "$1" == -* ]]; then
+if [[ "$#" -gt 2 || "$1" == -* ]]; then
   echo "Regenerates packaging data for the SchildiChat packages."
-  echo "Usage: $0 [git release tag]"
+  echo "Usage: $0 [git revision or tag] [version string override]"
   exit 1
 fi
 
-version="$1"
+rev="$1"
+version="$2"
 
 set -euo pipefail
 
-if [ -z "$version" ]; then
-  version="$(wget -O- "https://api.github.com/repos/SchildiChat/schildichat-desktop/releases?per_page=1" | jq -r '.[0].tag_name')"
+if [ -z "$rev" ]; then
+  rev="$(wget -O- "https://api.github.com/repos/SchildiChat/schildichat-desktop/releases?per_page=1" | jq -r '.[0].tag_name')"
 fi
 
-# strip leading "v"
-version="${version#v}"
+if [ -z "$version" ]; then
+  # strip leading "v"
+  version="${rev#v}"
+fi
 
-src_data=$(nix-prefetch-git https://github.com/SchildiChat/schildichat-desktop --fetch-submodules --rev v${version})
+src_data=$(nix-prefetch-git https://github.com/SchildiChat/schildichat-desktop --fetch-submodules --rev $rev)
 src=$(echo $src_data | jq -r .path)
 src_hash=$(echo $src_data | jq -r .sha256)
 
@@ -28,6 +31,7 @@ desktop_yarn_hash=$(prefetch-yarn-deps $src/element-desktop/yarn.lock)
 cat > pin.json << EOF
 {
   "version": "$version",
+  "rev": "$rev",
   "srcHash": "$src_hash",
   "webYarnHash": "$web_yarn_hash",
   "desktopYarnHash": "$desktop_yarn_hash"
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6c49c8cbc5f8..4c8d9ec44fcc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5011,7 +5011,7 @@ with pkgs;
 
   schildichat-desktop = callPackage ../applications/networking/instant-messengers/schildichat/schildichat-desktop.nix {
     inherit (darwin.apple_sdk.frameworks) Security AppKit CoreServices;
-    electron = electron_13;
+    electron = electron_15;
   };
   schildichat-desktop-wayland = writeScriptBin "schildichat-desktop" ''
     #!/bin/sh