diff --git a/run.ps1 b/run.ps1
index b7de403018..412062239a 100644
--- a/run.ps1
+++ b/run.ps1
@@ -26,12 +26,18 @@ The base url where build tools can be downloaded. Overrides the value from the c
 .PARAMETER Update
 Updates KoreBuild to the latest version even if a lock file is present.
 
+.PARAMETER Reinstall
+Re-installs KoreBuild
+
 .PARAMETER ConfigFile
 The path to the configuration file that stores values. Defaults to korebuild.json.
 
 .PARAMETER ToolsSourceSuffix
 The Suffix to append to the end of the ToolsSource. Useful for query strings in blob stores.
 
+.PARAMETER CI
+Sets up CI specific settings and variables.
+
 .PARAMETER Arguments
 Arguments to be passed to the command
 
@@ -65,8 +71,10 @@ param(
     [string]$ToolsSource,
     [Alias('u')]
     [switch]$Update,
-    [string]$ConfigFile,
+    [switch]$Reinstall,
     [string]$ToolsSourceSuffix,
+    [string]$ConfigFile = $null,
+    [switch]$CI,
     [Parameter(ValueFromRemainingArguments = $true)]
     [string[]]$Arguments
 )
@@ -93,6 +101,10 @@ function Get-KoreBuild {
     $version = $version.TrimStart('version:').Trim()
     $korebuildPath = Join-Paths $DotNetHome ('buildtools', 'korebuild', $version)
 
+    if ($Reinstall -and (Test-Path $korebuildPath)) {
+        Remove-Item -Force -Recurse $korebuildPath
+    }
+
     if (!(Test-Path $korebuildPath)) {
         Write-Host -ForegroundColor Magenta "Downloading KoreBuild $version"
         New-Item -ItemType Directory -Path $korebuildPath | Out-Null
@@ -101,9 +113,9 @@ function Get-KoreBuild {
         try {
             $tmpfile = Join-Path ([IO.Path]::GetTempPath()) "KoreBuild-$([guid]::NewGuid()).zip"
             Get-RemoteFile $remotePath $tmpfile $ToolsSourceSuffix
-            if (Get-Command -Name 'Expand-Archive' -ErrorAction Ignore) {
+            if (Get-Command -Name 'Microsoft.PowerShell.Archive\Expand-Archive' -ErrorAction Ignore) {
                 # Use built-in commands where possible as they are cross-plat compatible
-                Expand-Archive -Path $tmpfile -DestinationPath $korebuildPath
+                Microsoft.PowerShell.Archive\Expand-Archive -Path $tmpfile -DestinationPath $korebuildPath
             }
             else {
                 # Fallback to old approach for old installations of PowerShell
@@ -188,9 +200,9 @@ $korebuildPath = Get-KoreBuild
 Import-Module -Force -Scope Local (Join-Path $korebuildPath 'KoreBuild.psd1')
 
 try {
-    Set-KoreBuildSettings -ToolsSource $ToolsSource -DotNetHome $DotNetHome -RepoPath $Path -ConfigFile $ConfigFile
+    Set-KoreBuildSettings -ToolsSource $ToolsSource -DotNetHome $DotNetHome -RepoPath $Path -ConfigFile $ConfigFile -CI:$CI
     Invoke-KoreBuildCommand $Command @Arguments
 }
 finally {
     Remove-Module 'KoreBuild' -ErrorAction Ignore
-}
\ No newline at end of file
+}
diff --git a/run.sh b/run.sh
index 834961fc3a..27e7d7ac6f 100755
--- a/run.sh
+++ b/run.sh
@@ -14,10 +14,12 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 [ -z "${DOTNET_HOME:-}" ] && DOTNET_HOME="$HOME/.dotnet"
 verbose=false
 update=false
+reinstall=false
 repo_path="$DIR"
 channel=''
 tools_source=''
 tools_source_suffix=''
+ci=false
 
 #
 # Functions
@@ -38,6 +40,8 @@ __usage() {
     echo "    -s|--tools-source|-ToolsSource <URL>                  The base url where build tools can be downloaded. Overrides the value from the config file."
     echo "    --tools-source-suffix|-ToolsSourceSuffix <SUFFIX>     The suffix to append to tools-source. Useful for query strings."
     echo "    -u|--update                                           Update to the latest KoreBuild even if the lock file is present."
+    echo "    --reinstall                                           Reinstall KoreBuild."
+    echo "    --ci                                                  Apply CI specific settings and environment variables."
     echo ""
     echo "Description:"
     echo "    This function will create a file \$DIR/korebuild-lock.txt. This lock file can be committed to source, but does not have to be."
@@ -62,6 +66,10 @@ get_korebuild() {
     version="$(echo "${version#version:}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
     local korebuild_path="$DOTNET_HOME/buildtools/korebuild/$version"
 
+    if [ "$reinstall" = true ] && [ -d "$korebuild_path" ]; then
+        rm -rf "$korebuild_path"
+    fi
+
     {
         if [ ! -d "$korebuild_path" ]; then
             mkdir -p "$korebuild_path"
@@ -175,6 +183,12 @@ while [[ $# -gt 0 ]]; do
         -u|--update|-Update)
             update=true
             ;;
+        --reinstall|-[Rr]einstall)
+            reinstall=true
+            ;;
+        --ci|-[Cc][Ii])
+            ci=true
+            ;;
         --verbose|-Verbose)
             verbose=true
             ;;
@@ -227,5 +241,5 @@ fi
 [ -z "$tools_source" ] && tools_source='https://aspnetcore.blob.core.windows.net/buildtools'
 
 get_korebuild
-set_korebuildsettings "$tools_source" "$DOTNET_HOME" "$repo_path" "$config_file"
+set_korebuildsettings "$tools_source" "$DOTNET_HOME" "$repo_path" "$config_file" "$ci"
 invoke_korebuild_command "$command" "$@"