diff --git a/csharp/build_release.sh b/csharp/build_release.sh
index 8a641b21b3..40452925e3 100755
--- a/csharp/build_release.sh
+++ b/csharp/build_release.sh
@@ -3,8 +3,8 @@
 cd $(dirname $(readlink $BASH_SOURCE))
 
 # Disable some unwanted dotnet options
-set DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
-set DOTNET_CLI_TELEMETRY_OPTOUT=true
+export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
+export DOTNET_CLI_TELEMETRY_OPTOUT=true
 
 # Builds Google.Protobuf NuGet packages
 dotnet restore -s /lib/csharp/ src/Google.Protobuf/Google.Protobuf.csproj