diff --git a/build/README-bundle.md b/build/README-bundle.md
index 2bbe652eb..4dc96c687 100644
--- a/build/README-bundle.md
+++ b/build/README-bundle.md
@@ -34,10 +34,10 @@ development = true
 
 - You can also specify a URL, together with a sha256 checksum to avoid downloading from
   github.
-- You can also specify an EnvVar, to provide the path dynamically at runtime.
+- You can also specify an environment variable (`LOTUS_BUILTIN_ACTORS_VX_BUNDLE`), to provide the path dynamically at runtime.
 
 The precedence for bundle fetching/loading is as folllows:
-- Check the EnvVar; use the bundle specified by it.
+- Check the environment variable `LOTUS_BUILTIN_ACTORS_VX_BUNDLE` for version X bundle; use it if set.
 - Check the Path; use the bundle specified by it.
 - Check the URL; use the bundle specified by it, and verify the checksum which must be present.
 - Otherwise, use the release tag and download from github.
diff --git a/build/bundle.go b/build/bundle.go
index e404abf09..c1c5df611 100644
--- a/build/bundle.go
+++ b/build/bundle.go
@@ -20,8 +20,6 @@ type Bundle struct {
 	Version actors.Version
 	// Release is the release id
 	Release string
-	// EnvVar is the (optional) env var specifying the bundle path; takes precdence over path
-	EnvVar string
 	// Path is the (optional) bundle path; takes precedence over url
 	Path string
 	// URL is the (optional) bundle URL; takes precdence over github release
diff --git a/node/bundle/manifest.go b/node/bundle/manifest.go
index 0e4819ce2..c1a5b0953 100644
--- a/node/bundle/manifest.go
+++ b/node/bundle/manifest.go
@@ -2,6 +2,7 @@ package bundle
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"os"
 
@@ -86,13 +87,11 @@ func FetchAndLoadBundles(ctx context.Context, bs blockstore.Blockstore, bar map[
 	}
 
 	for av, bd := range bar {
+		envvar := fmt.Sprintf("LOGUS_BUILTIN_ACTORS_V%d_BUNDLE", av)
 		switch {
-		case bd.EnvVar != "":
+		case os.Getenv(envvar) != "":
 			// this is a local bundle, specified by an env var to load from the filesystem
-			path := os.Getenv(bd.EnvVar)
-			if path == "" {
-				return xerrors.Errorf("bundle envvar is empty: %s", bd.EnvVar)
-			}
+			path := os.Getenv(envvar)
 
 			if _, err := LoadBundle(ctx, bs, path, av); err != nil {
 				return err
diff --git a/node/modules/builtin_actors.go b/node/modules/builtin_actors.go
index c7cacaa56..3697747d8 100644
--- a/node/modules/builtin_actors.go
+++ b/node/modules/builtin_actors.go
@@ -68,14 +68,11 @@ func LoadBuiltinActors(lc fx.Lifecycle, mctx helpers.MetricsCtx, r repo.LockedRe
 		}
 
 		// we haven't recorded it in the datastore, so we need to load it
+		envvar := fmt.Sprintf("LOGUS_BUILTIN_ACTORS_V%d_BUNDLE", av)
 		var mfCid cid.Cid
 		switch {
-		case bd.EnvVar != "":
-			// this is a local bundle, specified by an env var to load from the filesystem
-			path := os.Getenv(bd.EnvVar)
-			if path == "" {
-				return result, xerrors.Errorf("bundle envvar is empty: %s", bd.EnvVar)
-			}
+		case os.Getenv(envvar) != "":
+			path := os.Getenv(envvar)
 
 			mfCid, err = bundle.LoadBundle(ctx, bs, path, av)
 			if err != nil {