We should remove file only when checksums are calculated

files/package_pool.go

@@ -336,10 +336,6 @@ func (pool *PackagePool) Import(srcPath, basename string, checksums *utils.Check
 		}
 	}
 
-	if err == nil && move {
-		err = os.Remove(srcPath)
-	}
-
 	if err == nil {
 		if !checksums.Complete() {
 			// need full checksums here
@@ -352,6 +348,10 @@ func (pool *PackagePool) Import(srcPath, basename string, checksums *utils.Check
 		err = checksumStorage.Update(poolPath, checksums)
 	}
 
+	if err == nil && move {
+		err = os.Remove(srcPath)
+	}
+
 	return poolPath, err
 }