diff --git a/README.md b/README.md
index 2330d10..c9bcff6 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,14 @@ verifying checksum
 checksum verified
 ```
 
+## `GOROOT` and `GOPATH` Overrides
+
+By default, `$GOROOT` and `$GOPATH` are set to the selected version's
+`.../go` and `.../packages` dirs, and unset if the selected version is
+`system`. Set the `$ASDF_GOLANG_DISABLE_GOROOT` and/or
+`$ASDF_GOLANG_DISABLE_GOPATH` environment variables to `1` to disable
+this behavior for the respective variables.
+
 ## Contributing
 
 Feel free to create an issue or pull request if you find a bug.
diff --git a/bin/exec-env b/bin/exec-env
index 093d7d0..7ff1c06 100755
--- a/bin/exec-env
+++ b/bin/exec-env
@@ -1,8 +1,11 @@
 #!/usr/bin/env bash
 
 if [ "${ASDF_INSTALL_VERSION}" = 'system' ] ; then
-  unset -v GOROOT GOPATH
+  [ "${ASDF_GOLANG_DISABLE_GOROOT-}" = '1' ] || unset -v GOROOT
+  [ "${ASDF_GOLANG_DISABLE_GOPATH-}" = '1' ] || unset -v GOPATH
 else
-	export GOROOT=$ASDF_INSTALL_PATH/go
-	export GOPATH=$ASDF_INSTALL_PATH/packages
+	[ "${ASDF_GOLANG_DISABLE_GOROOT-}" = '1' ] ||
+    export GOROOT=$ASDF_INSTALL_PATH/go
+	[ "${ASDF_GOLANG_DISABLE_GOPATH-}" = '1' ] ||
+	  export GOPATH=$ASDF_INSTALL_PATH/packages
 fi