diff --git a/metropolis/installer/test/run_test.go b/metropolis/installer/test/run_test.go
index 925e758..3c8f1a6 100644
--- a/metropolis/installer/test/run_test.go
+++ b/metropolis/installer/test/run_test.go
@@ -124,7 +124,7 @@
 		return fmt.Errorf("couldn't read the installer ESP: %w", err)
 	}
 	// Make sure the EFI payload exists by attempting to open it.
-	efiPayload, err := fs.OpenFile(osimage.EFIPayloadPath, os.O_RDONLY)
+	efiPayload, err := fs.OpenFile("/"+osimage.EFIPayloadPath, os.O_RDONLY)
 	if err != nil {
 		return fmt.Errorf("couldn't open the installer's EFI Payload at %q: %w", osimage.EFIPayloadPath, err)
 	}
diff --git a/metropolis/node/core/update/update.go b/metropolis/node/core/update/update.go
index 3d3060d..53bcb96 100644
--- a/metropolis/node/core/update/update.go
+++ b/metropolis/node/core/update/update.go
@@ -505,7 +505,7 @@
 		}
 		switch p := e.FilePath[1].(type) {
 		case efivarfs.FilePath:
-			if string(p) == osimage.EFIPayloadPath {
+			if string(p) == "/"+osimage.EFIPayloadPath {
 				if validBootEntryIdx == -1 {
 					validBootEntryIdx = int(idx)
 				} else {
@@ -541,7 +541,7 @@
 						PartitionUUID: s.ESPPart.ID,
 					},
 				},
-				efivarfs.FilePath(osimage.EFIPayloadPath),
+				efivarfs.FilePath("/" + osimage.EFIPayloadPath),
 			},
 		})
 		if err == nil {