diff --git a/images/linux/scripts/installers/dotnetcore-sdk.sh b/images/linux/scripts/installers/dotnetcore-sdk.sh
index 08b553d0e..68f07c4f7 100644
--- a/images/linux/scripts/installers/dotnetcore-sdk.sh
+++ b/images/linux/scripts/installers/dotnetcore-sdk.sh
@@ -6,19 +6,19 @@
 source $HELPER_SCRIPTS/etc-environment.sh
 source $HELPER_SCRIPTS/apt.sh
 source $HELPER_SCRIPTS/document.sh
+source $HELPER_SCRIPTS/os.sh
 
-if isUbuntu20 ; then
+imageLabel=$(getOSVersionLabel)
+
+# Ubuntu 20 doesn't support EOL versions
+if [ $imageLabel != "focal" ]; then
+    LATEST_DOTNET_PACKAGES=("dotnet-sdk-3.0" "dotnet-sdk-3.1")
+    release_urls=("https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/2.1/releases.json" "https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/2.2/releases.json" "https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/3.0/releases.json" "https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/3.1/releases.json")
+else
     LATEST_DOTNET_PACKAGES=("dotnet-sdk-3.1")
     release_urls=("https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/2.1/releases.json" "https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/3.1/releases.json")
 fi
 
-if isUbuntu16 || isUbuntu18 ; then
-    LATEST_DOTNET_PACKAGES=("dotnet-sdk-3.0" "dotnet-sdk-3.1")
-    release_urls=("https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/2.1/releases.json" "https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/2.2/releases.json" "https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/3.0/releases.json" "https://dotnetcli.blob.core.windows.net/dotnet/release-metadata/3.1/releases.json")
-fi
-
-LSB_RELEASE=$(lsb_release -rs)
-
 mksamples()
 {
     sdk=$1