diff --git a/env b/env
index 773cb07a..d1f7bb8e 100644
--- a/env
+++ b/env
@@ -1,5 +1,6 @@
-MAJOR_GOVERSION=$( go version | grep -o 'go1\.[0-9]')
-FULL_GOVERSION=$( go version| grep -o 'go1\.[0-9|\.]*' )
+# For development versions of Go, these will be empty.
+MAJOR_GOVERSION=$( go version | grep -o 'go1\.[0-9]' || true)
+FULL_GOVERSION=$( go version| grep -o 'go1\.[0-9|\.]*' || true)
 
 # The list of unsupported major go versions.
 UNSUPPORTED=( "go1.0" "go1.1" "go1.2" "go1.3" "go1.4" )