diff --git a/unvis_c.go b/unvis_c.go
index <HASH>..<HASH> 100644
--- a/unvis_c.go
+++ b/unvis_c.go
@@ -1,4 +1,4 @@
-// +build cgo,!govis
+// +build cgo,cvis
 
 package mtree
 
diff --git a/unvis_go.go b/unvis_go.go
index <HASH>..<HASH> 100644
--- a/unvis_go.go
+++ b/unvis_go.go
@@ -1,4 +1,4 @@
-// +build !cgo govis
+// +build !cvis
 
 package mtree
 
diff --git a/vis_c.go b/vis_c.go
index <HASH>..<HASH> 100644
--- a/vis_c.go
+++ b/vis_c.go
@@ -1,4 +1,4 @@
-// +build cgo,!govis
+// +build cgo,cvis
 
 package mtree
 
diff --git a/vis_go.go b/vis_go.go
index <HASH>..<HASH> 100644
--- a/vis_go.go
+++ b/vis_go.go
@@ -1,4 +1,4 @@
-// +build !cgo govis
+// +build !cvis
 
 package mtree
vis: switch to the golang vis by default

and have the C vis()/unvis() available as a 'cvis' build tag.