diff --git a/build/builtin-actors/fetch-bundles.sh b/build/builtin-actors/fetch-bundles.sh
index 58fb5c39d..bf4d44a55 100755
--- a/build/builtin-actors/fetch-bundles.sh
+++ b/build/builtin-actors/fetch-bundles.sh
@@ -58,10 +58,26 @@ fetch_bundle() {
     popd
 }
 
+touch_bundles() {
+    ver=$1
+
+    if [ ! -e $ver ]; then
+        mkdir $ver
+    fi
+
+    for net in mainnet caterpillarnet butterflynet calibrationnet devnet testing; do
+        touch $ver/builtin-actors-$net.car
+    done
+}
+
 if [ -n "$actors7_release" ]; then
     fetch v7 "$actors7_release"
+else
+    touch_bundles v7
 fi
 
 if [ -n "$actors8_release" ]; then
     fetch v8 "$actors8_release"
+else
+    touch_bundles v8
 fi
diff --git a/build/builtin_actors_2k.go b/build/builtin_actors_2k.go
new file mode 100644
index 000000000..1dfee49dc
--- /dev/null
+++ b/build/builtin_actors_2k.go
@@ -0,0 +1,22 @@
+//go:build debug || 2k || testground
+// +build debug 2k testground
+
+package build
+
+import (
+	_ "embed"
+)
+
+//go:embed builtin-actors/v8/builtin-actors-devnet.car
+var actorsv8 []byte
+
+func BuiltinActorsV8Bundle() []byte {
+	return actorsv8
+}
+
+//go:embed builtin-actors/v7/builtin-actors-devnet.car
+var actorsv7 []byte
+
+func BuiltinActorsV7Bundle() []byte {
+	return actorsv7
+}
diff --git a/build/builtin_actors_butterfly.go b/build/builtin_actors_butterfly.go
new file mode 100644
index 000000000..d3d76e8f9
--- /dev/null
+++ b/build/builtin_actors_butterfly.go
@@ -0,0 +1,22 @@
+//go:build butterflynet
+// +build butterflynet
+
+package build
+
+import (
+	_ "embed"
+)
+
+//go:embed builtin-actors/v8/builtin-actors-butterflynet.car
+var actorsv8 []byte
+
+func BuiltinActorsV8Bundle() []byte {
+	return actorsv8
+}
+
+//go:embed builtin-actors/v7/builtin-actors-butterflynet.car
+var actorsv7 []byte
+
+func BuiltinActorsV7Bundle() []byte {
+	return actorsv7
+}
diff --git a/build/builtin_actors.go b/build/builtin_actors_calibnet.go
similarity index 54%
rename from build/builtin_actors.go
rename to build/builtin_actors_calibnet.go
index 56bc5169a..d73760a77 100644
--- a/build/builtin_actors.go
+++ b/build/builtin_actors_calibnet.go
@@ -1,17 +1,20 @@
+//go:build calibnet
+// +build calibnet
+
 package build
 
 import (
 	_ "embed"
 )
 
-//go:embed builtin-actors/builtin-actors-v8.car
+//go:embed builtin-actors/v8/builtin-actors-calibrationnet.car
 var actorsv8 []byte
 
 func BuiltinActorsV8Bundle() []byte {
 	return actorsv8
 }
 
-//go:embed builtin-actors/builtin-actors-v7.car
+//go:embed builtin-actors/v7/builtin-actors-calibrationnet.car
 var actorsv7 []byte
 
 func BuiltinActorsV7Bundle() []byte {
diff --git a/build/builtin_actors_interop.go b/build/builtin_actors_interop.go
new file mode 100644
index 000000000..8203e4b3d
--- /dev/null
+++ b/build/builtin_actors_interop.go
@@ -0,0 +1,22 @@
+//go:build interopnet
+// +build interopnet
+
+package build
+
+import (
+	_ "embed"
+)
+
+//go:embed builtin-actors/v8/builtin-actors-caterpillarnet.car
+var actorsv8 []byte
+
+func BuiltinActorsV8Bundle() []byte {
+	return actorsv8
+}
+
+//go:embed builtin-actors/v7/builtin-actors-caterpillarnet.car
+var actorsv7 []byte
+
+func BuiltinActorsV7Bundle() []byte {
+	return actorsv7
+}
diff --git a/build/builtin_actors_mainnet.go b/build/builtin_actors_mainnet.go
new file mode 100644
index 000000000..400ac7827
--- /dev/null
+++ b/build/builtin_actors_mainnet.go
@@ -0,0 +1,22 @@
+//go:build !debug && !2k && !testground && !calibnet && !nerpanet && !butterflynet && !interopnet
+// +build !debug,!2k,!testground,!calibnet,!nerpanet,!butterflynet,!interopnet
+
+package build
+
+import (
+	_ "embed"
+)
+
+//go:embed builtin-actors/v8/builtin-actors-mainnet.car
+var actorsv8 []byte
+
+func BuiltinActorsV8Bundle() []byte {
+	return actorsv8
+}
+
+//go:embed builtin-actors/v7/builtin-actors-mainnet.car
+var actorsv7 []byte
+
+func BuiltinActorsV7Bundle() []byte {
+	return actorsv7
+}