Setting all the env.

And, getting the `-` correct.

internal/pipes/s3.go

@@ -12,18 +12,20 @@ import (
 
 // https://bitfieldconsulting.com/golang/scripting
 func S3(in_pipe *script.Pipe, up *vcap.CredentialsS3, prefix string, source_db string) *script.Pipe {
-	os.Setenv("ACCESS_KEY_ID", up.AccessKeyId)
-	os.Setenv("SECRET_ACCESS_KEY", up.SecretAccessKey)
+	os.Setenv("AWS_ACCESS_KEY_ID", up.AccessKeyId)
+	os.Setenv("AWS_SECRET_ACCESS_KEY", up.SecretAccessKey)
+	os.Setenv("AWS_DEFAULT_REGION", up.Region)
+
 	// https://serverfault.com/questions/886562/streaming-postgresql-pg-dump-to-s3
 	cmd := []string{
 		"aws",
 		"s3",
 		"cp",
+		"-",
 		fmt.Sprintf("s3://%s/backups/%s-%s.dump",
 			up.Bucket,
 			prefix,
 			source_db),
-		"-",
 	}
 
 	// Combine the slice for printing and execution.