diff --git a/docs/install-understack-ubuntu-k3s.md b/docs/install-understack-ubuntu-k3s.md
index 34cd1190e..1e57a0726 100644
--- a/docs/install-understack-ubuntu-k3s.md
+++ b/docs/install-understack-ubuntu-k3s.md
@@ -4,7 +4,7 @@
 
 Install some packages we'll need later and some useful troubleshooting utilities.
 ```bash
-apt-get -y install curl jq yq net-tools telnet git apt-transport-https golang-go
+apt-get -y install curl jq yq net-tools telnet git apt-transport-https
 ```
 
 ## Update Ubuntu
@@ -65,7 +65,7 @@ References:
 ## Install Cert Manager cmctl
 
 ```bash
-OS=$(go env GOOS); ARCH=$(go env GOARCH); curl -fsSL -o cmctl.tar.gz https://github.com/cert-manager/cert-manager/releases/latest/download/cmctl-$OS-$ARCH.tar.gz
+curl -fsSL -o cmctl.tar.gz https://github.com/cert-manager/cert-manager/releases/latest/download/cmctl-linux-amd64.tar.gz
 tar xzf cmctl.tar.gz
 sudo mv cmctl /usr/local/bin
 ```