diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e70bb2c7..3ecdbb04 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
 
   cache:
     runs-on: self-hosted
-    timeout-minutes: 20
+    timeout-minutes: 30
     if: ${{ !cancelled() }}
 
     steps:
@@ -38,6 +38,8 @@ jobs:
         run: make sim-test
       - name: run fpga test
         run: make fpga-test
+      - name: run synthesis test (yosys)
+        run: make syn-test
 
   reuse:
     runs-on: self-hosted
diff --git a/Makefile b/Makefile
index a7e8d02b..8204d388 100644
--- a/Makefile
+++ b/Makefile
@@ -62,6 +62,14 @@ fpga-test:
 	make fpga-build BE_IF=IOb
 	make fpga-build BE_IF=AXI4
 
+
+syn-build: clean setup
+	nix-shell --run "make -C $(BUILD_DIR) syn-build"
+
+syn-test:
+	make syn-build BE_IF=IOb
+	make syn-build BE_IF=AXI4
+
 doc-build: clean setup
 	nix-shell --run "make -C $(BUILD_DIR) doc-build DOC=$(DOC)"
 
diff --git a/default.nix b/default.nix
index aedf9f3e..355014de 100644
--- a/default.nix
+++ b/default.nix
@@ -5,8 +5,8 @@
 { pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/25.05.tar.gz") {} }:
 
 let
-  py2hwsw_commit = "dace76f2193e23ac7b38be4f783d6c74e458d087"; # Replace with the desired commit.
-  py2hwsw_sha256 = "tKGm5hAsRKjkYKPaXGVydIfnJZM4DqUTff+eDlVaDkA="; # Replace with the actual SHA256 hash.
+  py2hwsw_commit = "13d2f9d76e3af80c76293e6f5ad0db8593c3e405"; # Replace with the desired commit.
+  py2hwsw_sha256 = "AjDDJZZgTEllKfImNtj5MyDP2A4eqVge6bP8fgo2STM="; # Replace with the actual SHA256 hash.
   # Get local py2hwsw root from `PY2HWSW_ROOT` env variable
   py2hwswRoot = builtins.getEnv "PY2HWSW_ROOT";