diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ffdac3a21..79baf2305 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -15,10 +15,11 @@ jobs:
     name: Build Linux amd64 wheel (musl)
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
+          persist-credentials: false
           ssh-key: ${{ secrets.SSH_PRIVATE_KEY }}
 
       - name: Build wheel in Alpine container
@@ -31,7 +32,7 @@ jobs:
               set -ex
               apk add --no-cache \
                 build-base bison flex flex-dev gperf \
-                tcl-dev readline-dev zlib-dev libffi-dev \
+                tcl-dev zlib-dev libffi-dev \
                 libdwarf-dev elfutils-dev \
                 python3 python3-dev py3-pip py3-setuptools py3-wheel \
                 git pkgconf ccache
@@ -50,9 +51,8 @@ jobs:
 
               # Build the wheel via setup.py
               pip install --break-system-packages pybind11 cxxheaderparser
-              _PYOSYS_OVERRIDE_VER=$(
-                grep "^YOSYS_VER " Makefile | head -1 | sed "s/.*:= *//" | tr "+" "."
-              ) python3 setup.py bdist_wheel --dist-dir /src/dist
+              mkdir -p /src/dist
+              python3 -m pip wheel . --wheel-dir /src/dist
             '
 
       - uses: actions/upload-artifact@v4
@@ -65,7 +65,7 @@ jobs:
     name: Build Linux amd64 wheel (manylinux2014, glibc 2.17+)
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
@@ -80,7 +80,7 @@ jobs:
             quay.io/pypa/manylinux2014_x86_64 bash -c '
               set -ex
 
-              yum install -y tcl-devel readline-devel zlib-devel libffi-devel \
+              yum install -y tcl-devel zlib-devel libffi-devel \
                 flex gperf ccache patchelf \
                 elfutils-devel elfutils-libelf-devel libdwarf-devel
 
@@ -104,10 +104,8 @@ jobs:
               cd /src
 
               pip3 install --upgrade pip setuptools wheel pybind11 cxxheaderparser
-
-              _PYOSYS_OVERRIDE_VER=$(
-                grep "^YOSYS_VER " Makefile | head -1 | sed "s/.*:= *//" | tr "+" "."
-              ) python3 setup.py bdist_wheel --dist-dir /src/dist-manylinux
+              mkdir -p dist-manylinux
+              python3 -m pip wheel . --wheel-dir /src/dist-manylinux
 
               # Tag wheel as manylinux2014
               pip3 install auditwheel || true
@@ -126,10 +124,11 @@ jobs:
     name: Build macOS arm64 wheel
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
           submodules: recursive
+          persist-credentials: false
           ssh-key: ${{ secrets.SSH_PRIVATE_KEY }}
 
       - uses: actions/setup-python@v5
@@ -138,7 +137,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          brew install bison flex gperf tcl-tk@8 readline libffi dwarfutils libelf ccache
+          brew install bison flex gperf tcl-tk@8 libffi dwarfutils libelf ccache
           pip3 install pybind11 cxxheaderparser setuptools wheel
 
       - name: Build Verific tclmain
@@ -152,9 +151,8 @@ jobs:
         run: |
           export PATH="$(brew --prefix bison)/bin:$(brew --prefix flex)/bin:$PATH"
           export MACOSX_DEPLOYMENT_TARGET=11.0
-          _PYOSYS_OVERRIDE_VER=$(
-            grep "^YOSYS_VER " Makefile | head -1 | sed "s/.*:= *//" | tr "+" "."
-          ) python3 setup.py bdist_wheel --dist-dir dist
+          mkdir -p dist
+          python3 -m pip wheel . --wheel-dir dist
 
       - uses: actions/upload-artifact@v4
         with:
diff --git a/cmake/SilimateVerific.cmake b/cmake/SilimateVerific.cmake
index a4fca0156..d3e642bec 100644
--- a/cmake/SilimateVerific.cmake
+++ b/cmake/SilimateVerific.cmake
@@ -105,7 +105,7 @@ if (YOSYS_ENABLE_VERIFIC)
 		${verific_include_dirs}
 	)
 	target_link_libraries(verific INTERFACE
-		$<LINK_LIBRARY:WHOLE_ARCHIVE,$<TARGET_FILE:verific_merged>>
+		verific_merged
 		PkgConfig::zlib
 	)
 
diff --git a/cmake/YosysVersionData.cmake b/cmake/YosysVersionData.cmake
index 4eb20ce5d..11ba96174 100644
--- a/cmake/YosysVersionData.cmake
+++ b/cmake/YosysVersionData.cmake
@@ -1,2 +1,2 @@
 set(YOSYS_VERSION_MAJOR 0)
-set(YOSYS_VERSION_MINOR 64)
+set(YOSYS_VERSION_MINOR 66)
diff --git a/silimate-shell.nix b/silimate-shell.nix
index 746035ff6..0afe477db 100644
--- a/silimate-shell.nix
+++ b/silimate-shell.nix
@@ -18,6 +18,7 @@
 in
 pkgs.mkShell {
 	buildInputs = with pkgs; [
+		ccache
 		bison
 		flex
 		cmake
@@ -43,12 +44,13 @@ pkgs.mkShell {
 		clang
 		iverilog # tests
 		gtkwave # vcd2fst
-		(python3.withPackages(ps: with ps; [pybind11 cxxheaderparser]))
+		(python3.withPackages(ps: with ps; [pip wheel pybind11 cxxheaderparser]))
 		gnu-ar
 		gtest
 	] ++ lib.optionals stdenv.isLinux [
 		elfutils # provides libdw.so (not to be confused with libdwarf.so)
 	];
 
+	CMAKE_CXX_COMPILER_LAUNCHER = "ccache";
 	cmakeFlags = [ "-DCMAKE_C_COMPILER=clang" "-DCMAKE_CXX_COMPILER=clang++" "-DCMAKE_BUILD_TYPE=Debug" "-DCMAKE_CXX_FLAGS=-O0" "-DYOSYS_WITH_PYTHON:BOOL=ON" ];
 }