diff --git a/config/config.go b/config/config.go
index 6fa3338..439e1fd 100644
--- a/config/config.go
+++ b/config/config.go
@@ -5,7 +5,6 @@
 package config
 
 import (
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -46,7 +45,7 @@ func (at *ArtifactType) UnmarshalTOML(data []byte) (err error) {
 	} else if strings.Contains(stypelower, "exploit") {
 		*at = KernelExploit
 	} else {
-		err = errors.New(fmt.Sprintf("Type %s is unsupported", stype))
+		err = fmt.Errorf("Type %s is unsupported", stype)
 	}
 	return
 }
@@ -59,7 +58,7 @@ func (at ArtifactType) MarshalTOML() (data []byte, err error) {
 	case KernelExploit:
 		s = "exploit"
 	default:
-		err = errors.New(fmt.Sprintf("Cannot marshal %d", at))
+		err = fmt.Errorf("Cannot marshal %d", at)
 	}
 	data = []byte(`"` + s + `"`)
 	return
@@ -129,7 +128,7 @@ func (dt *DistroType) UnmarshalTOML(data []byte) (err error) {
 	} else if strings.EqualFold(sDistro, "Debian") {
 		*dt = Debian
 	} else {
-		err = errors.New(fmt.Sprintf("Distro %s is unsupported", sDistro))
+		err = fmt.Errorf("Distro %s is unsupported", sDistro)
 	}
 	return
 }
@@ -144,7 +143,7 @@ func (dt DistroType) MarshalTOML() (data []byte, err error) {
 	case Debian:
 		s = "Debian"
 	default:
-		err = errors.New(fmt.Sprintf("Cannot marshal %d", dt))
+		err = fmt.Errorf("Cannot marshal %d", dt)
 	}
 	data = []byte(`"` + s + `"`)
 	return
diff --git a/kernel.go b/kernel.go
index d275fa5..5e5a37f 100644
--- a/kernel.go
+++ b/kernel.go
@@ -102,8 +102,7 @@ func generateBaseDockerImage(sk config.KernelMask) (err error) {
 		d += "RUN apt-get install -y build-essential libelf-dev\n"
 		d += "RUN apt-get install -y wget git\n"
 	default:
-		s := fmt.Sprintf("%s not yet supported", sk.DistroType.String())
-		err = errors.New(s)
+		err = fmt.Errorf("%s not yet supported", sk.DistroType.String())
 		return
 	}