diff --git a/cmd/run.go b/cmd/run.go
index ad19a30c..c5d13cf2 100644
--- a/cmd/run.go
+++ b/cmd/run.go
@@ -85,12 +85,22 @@ func runRun(ctx context.Context, ro options.RunOptions, args []string, signers .
 		attestors = append(attestors, commandrun.New(commandrun.WithCommand(args), commandrun.WithTracing(ro.Tracing)))
 	}
 
-	addtlAttestors, err := attestation.Attestors(ro.Attestations)
-	if err != nil {
-		return fmt.Errorf("failed to create attestors := %w", err)
+	for _, a := range ro.Attestations {
+		for _, att := range attestors {
+			if a == att.Name() {
+				log.Warnf("Attestator %s already declared, skipping", a)
+				break
+			} else {
+				attestor, err := attestation.AddAttestor(a)
+				if err != nil {
+					return fmt.Errorf("failed to create attestor: %w", err)
+				}
+				attestors = append(attestors, attestor)
+				break
+			}
+		}
 	}
 
-	attestors = append(attestors, addtlAttestors...)
 	for _, attestor := range attestors {
 		setters, ok := ro.AttestorOptSetters[attestor.Name()]
 		if !ok {
diff --git a/go.sum b/go.sum
index ea2d955b..8180b2dc 100644
--- a/go.sum
+++ b/go.sum
@@ -218,6 +218,8 @@ github.com/honeycombio/beeline-go v1.10.0 h1:cUDe555oqvw8oD76BQJ8alk7FP0JZ/M/zXp
 github.com/honeycombio/libhoney-go v1.16.0 h1:kPpqoz6vbOzgp7jC6SR7SkNj7rua7rgxvznI6M3KdHc=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
+github.com/imdario/mergo v0.3.13 h1:lFzP57bqS/wsqKssCGmtLAb8A0wKjLGrve2q3PPVcBk=
+github.com/imdario/mergo v0.3.13/go.mod h1:4lJ1jqUDcsbIECGy0RUJAXNIhg+6ocWgb1ALK2O4oXg=
 github.com/in-toto/archivista v0.2.0 h1:FViuHMVVETborvOqlmSYdROY8RmX3CO0V0MOhU/Rl20=
 github.com/in-toto/archivista v0.2.0/go.mod h1:qt9uN4TkHWUgR5A2wxRqQIBizSl32P2nI2AjESskkr0=
 github.com/in-toto/go-witness v0.2.0 h1:lxp3+Kc4Der2C1jV9ZePjSCEHUr2NsB4sImXI5sZHu4=