diff --git a/pkgs/applications/networking/cluster/k3s/default.nix b/pkgs/applications/networking/cluster/k3s/default.nix
index 78dffeb20ede..822a2c4b70a5 100644
--- a/pkgs/applications/networking/cluster/k3s/default.nix
+++ b/pkgs/applications/networking/cluster/k3s/default.nix
@@ -243,6 +243,9 @@ stdenv.mkDerivation rec {
   pname = "k3s";
   version = k3sVersion;
 
+  # `src` here is a workaround for the updateScript bot. It couldn't be empty.
+  src = builtins.filterSource (path: type: false) ./.;
+
   # Important utilities used by the kubelet, see
   # https://github.com/kubernetes/kubernetes/issues/26093#issuecomment-237202494
   # Note the list in that issue is stale and some aren't relevant for k3s.
diff --git a/pkgs/applications/networking/cluster/k3s/update.sh b/pkgs/applications/networking/cluster/k3s/update.sh
index 7956e807e9ec..34257fcda2fc 100755
--- a/pkgs/applications/networking/cluster/k3s/update.sh
+++ b/pkgs/applications/networking/cluster/k3s/update.sh
@@ -12,7 +12,7 @@ LATEST_TAG_RAWFILE=${WORKDIR}/latest_tag.json
 curl --silent ${GITHUB_TOKEN:+"-u \":$GITHUB_TOKEN\""} \
     https://api.github.com/repos/k3s-io/k3s/releases > ${LATEST_TAG_RAWFILE}
 
-LATEST_TAG_NAME=$(jq 'map(.tag_name)' ${LATEST_TAG_RAWFILE} | grep -v -e rc -e engine | sed 's/["|,| ]//g' | sort -r | head -n1)
+LATEST_TAG_NAME=$(jq 'map(.tag_name)' ${LATEST_TAG_RAWFILE} | grep -v -e rc -e engine | sed 's/["|,| ]//g' | sort -V -r | head -n1)
 K3S_VERSION=$(echo ${LATEST_TAG_NAME} | sed 's/^v//')
 
 K3S_COMMIT=$(curl --silent ${GITHUB_TOKEN:+"-u \":$GITHUB_TOKEN\""} \