diff --git a/build.ps1 b/build.ps1
index 8ef8d990..42541be8 100644
--- a/build.ps1
+++ b/build.ps1
@@ -24,6 +24,10 @@ param (
 
 .\download.ps1 $OutputPath
 
+if ( -Not $? ) {
+	Exit 1
+}
+
 Write-Host "Building $Configuration to $OutputPath"
 dotnet publish `
 	-c $Configuration `
diff --git a/download.ps1 b/download.ps1
index 39afedb1..5375136a 100644
--- a/download.ps1
+++ b/download.ps1
@@ -46,6 +46,11 @@ function DownloadAndExtract {
         $TargetPath
     )
     $json = Invoke-RestMethod "https://api.github.com/repos/$Owner/$Repo/git/refs/$ref"
+
+	if ( -Not $? ) {
+		Exit 1;
+	}
+
     $sha = $json.object.sha
     $archiveUrl = "https://github.com/$Owner/$Repo/archive/$sha.zip"