diff --git a/flake.nix b/flake.nix
index ad6ecbd0f..9920bf914 100644
--- a/flake.nix
+++ b/flake.nix
@@ -268,6 +268,7 @@
                     "scripts/wheel-rpc-server.py"
                     "deltachat-rpc-server/README.md"
                     "LICENSE"
+                    "Cargo.toml"
                   ];
                 };
                 nativeBuildInputs = [
@@ -280,7 +281,7 @@
                 buildPhase = ''
                   mkdir tmp
                   cp ${rpc-server}/bin/deltachat-rpc-server tmp/deltachat-rpc-server
-                  python3 scripts/wheel-rpc-server.py ${manifest.version} ${arch} tmp/deltachat-rpc-server
+                  python3 scripts/wheel-rpc-server.py ${arch} tmp/deltachat-rpc-server
                 '';
                 installPhase = ''mkdir -p $out; cp -av deltachat_rpc_server-*.whl $out'';
               };
@@ -311,6 +312,7 @@
                     "scripts/wheel-rpc-server.py"
                     "deltachat-rpc-server/README.md"
                     "LICENSE"
+                    "Cargo.toml"
                   ];
                 };
                 nativeBuildInputs = [
@@ -323,7 +325,7 @@
                 buildPhase = ''
                   mkdir tmp
                   cp ${deltachat-rpc-server-win64}/bin/deltachat-rpc-server.exe tmp/deltachat-rpc-server.exe
-                  python3 scripts/wheel-rpc-server.py ${manifest.version} win64 tmp/deltachat-rpc-server.exe
+                  python3 scripts/wheel-rpc-server.py win64 tmp/deltachat-rpc-server.exe
                 '';
                 installPhase = ''mkdir -p $out; cp -av deltachat_rpc_server-*.whl $out'';
               };
@@ -340,6 +342,7 @@
                     "scripts/wheel-rpc-server.py"
                     "deltachat-rpc-server/README.md"
                     "LICENSE"
+                    "Cargo.toml"
                   ];
                 };
                 nativeBuildInputs = [
@@ -352,7 +355,7 @@
                 buildPhase = ''
                   mkdir tmp
                   cp ${deltachat-rpc-server-win32}/bin/deltachat-rpc-server.exe tmp/deltachat-rpc-server.exe
-                  python3 scripts/wheel-rpc-server.py ${manifest.version} win32 tmp/deltachat-rpc-server.exe
+                  python3 scripts/wheel-rpc-server.py win32 tmp/deltachat-rpc-server.exe
                 '';
                 installPhase = ''mkdir -p $out; cp -av deltachat_rpc_server-*.whl $out'';
               };
@@ -405,7 +408,7 @@
                   pkgs.python3
                   pkgs.python3Packages.wheel
                 ];
-                buildPhase = ''python3 scripts/wheel-rpc-server.py ${manifest.version} source deltachat-rpc-server-${manifest.version}.tar.gz'';
+                buildPhase = ''python3 scripts/wheel-rpc-server.py source deltachat-rpc-server-${manifest.version}.tar.gz'';
                 installPhase = ''mkdir -p $out; cp -av deltachat-rpc-server-${manifest.version}.tar.gz $out'';
               };
 
diff --git a/scripts/wheel-rpc-server.py b/scripts/wheel-rpc-server.py
index 57d6a8004..8289a826c 100755
--- a/scripts/wheel-rpc-server.py
+++ b/scripts/wheel-rpc-server.py
@@ -163,13 +163,15 @@ arch2tags = {
 
 
 def main():
-    version = sys.argv[1]
-    if sys.argv[2] == "source":
+    with Path("Cargo.toml").open("rb") as fp:
+        cargo_manifest = tomllib.load(fp)
+    version = cargo_manifest["package"]["version"]
+    if sys.argv[1] == "source":
         filename = f"deltachat-rpc-server-{version}.tar.gz"
         build_source_package(version, filename)
     else:
-        arch = sys.argv[2]
-        executable = sys.argv[3]
+        arch = sys.argv[1]
+        executable = sys.argv[2]
         tags = arch2tags[arch]
 
         if arch in ["win32", "win64"]: