Fix misleading README install instructions.

Makefile

@@ -9,14 +9,6 @@ endif
 PROJECT := github.com/juju/juju
 PROJECT_DIR := $(shell go list -e -f '{{.Dir}}' $(PROJECT))
 
-ifeq ($(shell uname -p | sed -r 's/.*(86|armel|armhf|aarch64|ppc64le|s390x).*/golang/'), golang)
-	GO_C := golang-1.8
-	INSTALL_FLAGS :=
-else
-	GO_C := gccgo-4.9  gccgo-go
-	INSTALL_FLAGS := -gccgoflags=-static-libgo
-endif
-
 # Allow the tests to take longer on arm platforms.
 ifeq ($(shell uname -p | sed -r 's/.*(armel|armhf|aarch64).*/golang/'), golang)
 	TEST_TIMEOUT := 2400s
@@ -31,7 +23,6 @@ define DEPENDENCIES
   distro-info-data
   git
   zip
-  $(GO_C)
 endef
 
 default: build
@@ -98,7 +89,6 @@ rebuild-dependencies.tsv: godeps
 # PPA includes the required mongodb-server binaries.
 install-dependencies:
 	@echo Adding juju PPAs for golang and juju
-	@sudo apt-add-repository --yes ppa:juju/golang
 	@sudo apt-add-repository --yes ppa:juju/stable
 	@sudo apt-get update
 	@echo Installing dependencies

README.md

@@ -22,6 +22,23 @@ stable PPA, `https://launchpad.net/~juju/+archive/stable`, and can be installed
     sudo apt-add-repository ppa:juju/stable
     sudo apt-get update
     sudo apt-get install juju
+
+Getting Golang
+--------------
+
+`juju` currently depends on Go 1.8. One of the easiest ways to install golang is
+from a snap. You may need to first install the [snap client](https://snapcraft.io/docs/core/install).
+Installing the golang snap package is then as easy as
+
+    snap install go --classic
+
+You can read about the "classic" confinement policy [here](https://insights.ubuntu.com/2017/01/09/how-to-snap-introducing-classic-confinement/)
+
+If you want to use `apt`, then you can add the [juju-golang PPA](https://launchpad.net/~juju/+archive/ubuntu/golang) and then run the following
+
+    sudo apt install golang-1.8
+
+Alternatively, you can always follow the official [binary installation instructions](https://golang.org/doc/install#install)
 
 Setting GOPATH
 --------------