diff --git a/internal/volume/volume.go b/internal/volume/volume.go
index 617ff410..865e2adb 100644
--- a/internal/volume/volume.go
+++ b/internal/volume/volume.go
@@ -65,6 +65,11 @@ func Mount(workDirHost string, cacheDirHost string) (Volume, error) {
 		if err != nil {
 			return Volume{}, err
 		}
+	} else {
+		workDirHost, err = filepath.Abs(workDirHost)
+		if err != nil {
+			return Volume{}, fmt.Errorf("could not make the root directory %s an absolute path: %w", workDirHost, err)
+		}
 	}
 
 	if cacheDirHost == "" {
@@ -72,6 +77,11 @@ func Mount(workDirHost string, cacheDirHost string) (Volume, error) {
 		if err != nil {
 			return Volume{}, err
 		}
+	} else {
+		cacheDirHost, err = filepath.Abs(cacheDirHost)
+		if err != nil {
+			return Volume{}, fmt.Errorf("could not make the cache directory %s an absolute path: %w", cacheDirHost, err)
+		}
 	}
 
 	l := Volume{