diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..c9839d6
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+*.a binary
diff --git a/.github/workflows/build-v8-deps.yml b/.github/workflows/build-v8-deps.yml
index 2afd46b..dcf3e92 100644
--- a/.github/workflows/build-v8-deps.yml
+++ b/.github/workflows/build-v8-deps.yml
@@ -101,6 +101,10 @@ jobs:
           # use custom libcxx for all cross-compiles to avoid system header conflicts
           USE_SYSROOT="false"
           USE_CUSTOM_LIBCXX="false"
+          IS_CLANG="true"
+          if [[ "${{ matrix.target_os }}" == "linux" && "${{ matrix.target_arch }}" == "amd64" ]]; then
+            IS_CLANG="false"
+          fi
           if [[ "${{ matrix.target_os }}" == "linux" && "${{ matrix.target_arch }}" == "arm64" ]]; then
             USE_SYSROOT="true"
             USE_CUSTOM_LIBCXX="true"
@@ -111,13 +115,14 @@ jobs:
 
           cat > /tmp/gn_args.txt << EOF
           is_debug=false
-          is_clang=${{ matrix.target_os != 'linux' && 'true' || 'true' }}
+          is_clang=${IS_CLANG}
           target_os="${{ matrix.target_os == 'darwin' && 'mac' || matrix.target_os }}"
           target_cpu="${TARGET_CPU}"
           v8_target_cpu="${TARGET_CPU}"
           clang_use_chrome_plugins=false
           use_custom_libcxx=${USE_CUSTOM_LIBCXX}
           use_sysroot=${USE_SYSROOT}
+          use_thin_lto=false
           use_glib=false
           symbol_level=0
           strip_debug_info=true
@@ -168,7 +173,9 @@ jobs:
           import build
           build.args = Args()
           build.v8_path = os.path.join(os.getcwd(), 'v8')
-          build.is_clang = True
+          # Use system ar on Linux to produce GNU-format archives
+          # compatible with GNU ld (llvm-ar uses SysV64 format that ld rejects)
+          build.is_clang = ('${{ matrix.target_os }}' != 'linux')
 
           dest_path = os.path.join(os.getcwd(), '${{ matrix.target_os }}_${{ matrix.target_arch }}')
           os.makedirs(dest_path, exist_ok=True)
diff --git a/.gitignore b/.gitignore
index 05f61e4..827b308 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,14 @@ coverage.out
 .idea/
 .vscode/
 .cursor
+
+# V8 local build artifacts (gclient/depot_tools)
+deps/.cipd/
+deps/.gclient_entries
+deps/.gclient_previous_*
+deps/.gcs_entries
+deps/__pycache__/
+deps/_bad_scm/
+deps/v8/
+deps/depot_tools/
+deps/.build/
diff --git a/cgo.go b/cgo.go
index 93a2545..ffce290 100644
--- a/cgo.go
+++ b/cgo.go
@@ -3,6 +3,6 @@ package v8go
 //go:generate clang-format -i --verbose -style=Chromium v8go.h v8go.cc
 
 // #cgo CXXFLAGS: -fno-rtti -fPIC -std=c++20 -I${SRCDIR}/deps/include -Wall
-// #cgo CXXFLAGS: -DV8_COMPRESS_POINTERS -DV8_31BIT_SMIS_ON_64BIT_ARCH -DV8_ENABLE_SANDBOX
+// #cgo CXXFLAGS: -DV8_COMPRESS_POINTERS -DV8_31BIT_SMIS_ON_64BIT_ARCH
 // #cgo CXXFLAGS: -DV8_DEPRECATION_WARNINGS -DV8_IMMINENT_DEPRECATION_WARNINGS
 import "C"
diff --git a/deps/build.py b/deps/build.py
index 171cd25..6c68a71 100644
--- a/deps/build.py
+++ b/deps/build.py
@@ -75,6 +75,7 @@ def get_custom_deps():
 v8_target_cpu="%s"
 clang_use_chrome_plugins=false
 use_custom_libcxx=false
+use_thin_lto=false
 use_sysroot=false
 use_glib=false
 symbol_level=%s
diff --git a/deps/darwin_amd64/cgo.go b/deps/darwin_amd64/cgo.go
new file mode 100644
index 0000000..6c28f62
--- /dev/null
+++ b/deps/darwin_amd64/cgo.go
@@ -0,0 +1,6 @@
+package darwin_amd64
+
+// #cgo LDFLAGS: -pthread
+// #cgo LDFLAGS: ${SRCDIR}/libv8-0.a ${SRCDIR}/libv8-1.a ${SRCDIR}/libv8-2.a
+// #cgo LDFLAGS: -lc++ -framework CoreFoundation
+import "C"
diff --git a/deps/darwin_amd64/go.mod b/deps/darwin_amd64/go.mod
new file mode 100644
index 0000000..8289c1c
--- /dev/null
+++ b/deps/darwin_amd64/go.mod
@@ -0,0 +1,3 @@
+module github.com/tommie/v8go/deps/darwin_amd64
+
+go 1.19
diff --git a/deps/darwin_amd64/libmanifest b/deps/darwin_amd64/libmanifest
new file mode 100644
index 0000000..fbe1646
--- /dev/null
+++ b/deps/darwin_amd64/libmanifest
@@ -0,0 +1,3 @@
+libv8-0.a
+libv8-1.a
+libv8-2.a
diff --git a/deps/darwin_amd64/libv8-0.a b/deps/darwin_amd64/libv8-0.a
new file mode 100644
index 0000000..48f60fa
Binary files /dev/null and b/deps/darwin_amd64/libv8-0.a differ
diff --git a/deps/darwin_amd64/libv8-1.a b/deps/darwin_amd64/libv8-1.a
new file mode 100644
index 0000000..2bad06f
Binary files /dev/null and b/deps/darwin_amd64/libv8-1.a differ
diff --git a/deps/darwin_amd64/libv8-2.a b/deps/darwin_amd64/libv8-2.a
new file mode 100644
index 0000000..66f08d2
Binary files /dev/null and b/deps/darwin_amd64/libv8-2.a differ
diff --git a/deps/darwin_amd64/vendor.go b/deps/darwin_amd64/vendor.go
new file mode 100644
index 0000000..5930e91
--- /dev/null
+++ b/deps/darwin_amd64/vendor.go
@@ -0,0 +1 @@
+package darwin_amd64
diff --git a/deps/darwin_arm64/cgo.go b/deps/darwin_arm64/cgo.go
new file mode 100644
index 0000000..526dad5
--- /dev/null
+++ b/deps/darwin_arm64/cgo.go
@@ -0,0 +1,6 @@
+package darwin_arm64
+
+// #cgo LDFLAGS: -pthread
+// #cgo LDFLAGS: ${SRCDIR}/libv8-0.a ${SRCDIR}/libv8-1.a
+// #cgo LDFLAGS: -lc++ -framework CoreFoundation
+import "C"
diff --git a/deps/darwin_arm64/go.mod b/deps/darwin_arm64/go.mod
new file mode 100644
index 0000000..7b1e993
--- /dev/null
+++ b/deps/darwin_arm64/go.mod
@@ -0,0 +1,3 @@
+module github.com/tommie/v8go/deps/darwin_arm64
+
+go 1.19
diff --git a/deps/darwin_arm64/libmanifest b/deps/darwin_arm64/libmanifest
new file mode 100644
index 0000000..54effa8
--- /dev/null
+++ b/deps/darwin_arm64/libmanifest
@@ -0,0 +1,2 @@
+libv8-0.a
+libv8-1.a
diff --git a/deps/darwin_arm64/libv8-0.a b/deps/darwin_arm64/libv8-0.a
new file mode 100644
index 0000000..714991d
Binary files /dev/null and b/deps/darwin_arm64/libv8-0.a differ
diff --git a/deps/darwin_arm64/libv8-1.a b/deps/darwin_arm64/libv8-1.a
new file mode 100644
index 0000000..5c44ea7
Binary files /dev/null and b/deps/darwin_arm64/libv8-1.a differ
diff --git a/deps/darwin_arm64/vendor.go b/deps/darwin_arm64/vendor.go
new file mode 100644
index 0000000..1cb58ab
--- /dev/null
+++ b/deps/darwin_arm64/vendor.go
@@ -0,0 +1 @@
+package darwin_arm64
diff --git a/deps/linux_amd64/cgo.go b/deps/linux_amd64/cgo.go
new file mode 100644
index 0000000..d94ae84
--- /dev/null
+++ b/deps/linux_amd64/cgo.go
@@ -0,0 +1,6 @@
+package linux_amd64
+
+// #cgo LDFLAGS: -pthread
+// #cgo LDFLAGS: -Wl,--start-group ${SRCDIR}/libv8-0.a ${SRCDIR}/libv8-1.a ${SRCDIR}/libv8-2.a -Wl,--end-group
+// #cgo LDFLAGS: -ldl -lm -lstdc++
+import "C"
diff --git a/deps/linux_amd64/go.mod b/deps/linux_amd64/go.mod
new file mode 100644
index 0000000..8a52543
--- /dev/null
+++ b/deps/linux_amd64/go.mod
@@ -0,0 +1,3 @@
+module github.com/tommie/v8go/deps/linux_amd64
+
+go 1.19
diff --git a/deps/linux_amd64/libmanifest b/deps/linux_amd64/libmanifest
new file mode 100644
index 0000000..fbe1646
--- /dev/null
+++ b/deps/linux_amd64/libmanifest
@@ -0,0 +1,3 @@
+libv8-0.a
+libv8-1.a
+libv8-2.a
diff --git a/deps/linux_amd64/libv8-0.a b/deps/linux_amd64/libv8-0.a
new file mode 100644
index 0000000..a5457c4
Binary files /dev/null and b/deps/linux_amd64/libv8-0.a differ
diff --git a/deps/linux_amd64/libv8-1.a b/deps/linux_amd64/libv8-1.a
new file mode 100644
index 0000000..56d1d48
Binary files /dev/null and b/deps/linux_amd64/libv8-1.a differ
diff --git a/deps/linux_amd64/libv8-2.a b/deps/linux_amd64/libv8-2.a
new file mode 100644
index 0000000..a535a08
Binary files /dev/null and b/deps/linux_amd64/libv8-2.a differ
diff --git a/deps/linux_amd64/vendor.go b/deps/linux_amd64/vendor.go
new file mode 100644
index 0000000..5c3698b
--- /dev/null
+++ b/deps/linux_amd64/vendor.go
@@ -0,0 +1 @@
+package linux_amd64
diff --git a/deps/linux_arm64/cgo.go b/deps/linux_arm64/cgo.go
new file mode 100644
index 0000000..d637df2
--- /dev/null
+++ b/deps/linux_arm64/cgo.go
@@ -0,0 +1,6 @@
+package linux_arm64
+
+// #cgo LDFLAGS: -pthread
+// #cgo LDFLAGS: -Wl,--start-group ${SRCDIR}/libv8-0.a ${SRCDIR}/libv8-1.a ${SRCDIR}/libv8-2.a -Wl,--end-group
+// #cgo LDFLAGS: -ldl -lm -lstdc++
+import "C"
diff --git a/deps/linux_arm64/go.mod b/deps/linux_arm64/go.mod
new file mode 100644
index 0000000..b63f863
--- /dev/null
+++ b/deps/linux_arm64/go.mod
@@ -0,0 +1,3 @@
+module github.com/tommie/v8go/deps/linux_arm64
+
+go 1.19
diff --git a/deps/linux_arm64/libmanifest b/deps/linux_arm64/libmanifest
new file mode 100644
index 0000000..fbe1646
--- /dev/null
+++ b/deps/linux_arm64/libmanifest
@@ -0,0 +1,3 @@
+libv8-0.a
+libv8-1.a
+libv8-2.a
diff --git a/deps/linux_arm64/libv8-0.a b/deps/linux_arm64/libv8-0.a
new file mode 100644
index 0000000..57a61ad
Binary files /dev/null and b/deps/linux_arm64/libv8-0.a differ
diff --git a/deps/linux_arm64/libv8-1.a b/deps/linux_arm64/libv8-1.a
new file mode 100644
index 0000000..3204356
Binary files /dev/null and b/deps/linux_arm64/libv8-1.a differ
diff --git a/deps/linux_arm64/libv8-2.a b/deps/linux_arm64/libv8-2.a
new file mode 100644
index 0000000..eaac94a
Binary files /dev/null and b/deps/linux_arm64/libv8-2.a differ
diff --git a/deps/linux_arm64/vendor.go b/deps/linux_arm64/vendor.go
new file mode 100644
index 0000000..a6c5a08
--- /dev/null
+++ b/deps/linux_arm64/vendor.go
@@ -0,0 +1 @@
+package linux_arm64
diff --git a/go.mod b/go.mod
index 68e2fbd..f69cee0 100644
--- a/go.mod
+++ b/go.mod
@@ -10,3 +10,11 @@ require (
 	github.com/tommie/v8go/deps/linux_amd64 v0.0.0-20250515043113-5dcc98077472
 	github.com/tommie/v8go/deps/linux_arm64 v0.0.0-20250515043113-5dcc98077472
 )
+
+replace github.com/tommie/v8go/deps/darwin_amd64 => ./deps/darwin_amd64
+
+replace github.com/tommie/v8go/deps/darwin_arm64 => ./deps/darwin_arm64
+
+replace github.com/tommie/v8go/deps/linux_amd64 => ./deps/linux_amd64
+
+replace github.com/tommie/v8go/deps/linux_arm64 => ./deps/linux_arm64