fix: deb packages install command

distro/debian/debian.go

@@ -216,7 +216,7 @@ func ContainerCommands(km config.KernelMask) (commands []string) {
 			"/etc/apt/sources.list")
 	}
 
-	cmdf("{ apt-get update || apt-get update || apt-get update }")
+	cmdf("apt-get update || apt-get update || apt-get update")
 
 	packages := "wget build-essential libelf-dev git kmod linux-base "
 	packages += "initramfs-tools "
@@ -230,9 +230,9 @@ func ContainerCommands(km config.KernelMask) (commands []string) {
 		packages += "module-init-tools "
 	}
 
-	cmdf("{ apt-get install -y %s "+
+	cmdf("apt-get install -y %s "+
 		"|| apt-get install -y %s "+
-		"|| apt-get install -y %s }", packages, packages, packages)
+		"|| apt-get install -y %s", packages, packages, packages)
 
 	cmdf("mkdir -p /lib/modules")