Fix

Author: gnodet

maven-api-impl/src/main/java/org/apache/maven/internal/impl/model/DefaultModelBuilder.java

@@ -1185,6 +1185,9 @@ Model doReadFileModel() throws ModelBuilderException {
                     rootDirectory = request.getSession().getRootDirectory();
                 } catch (IllegalStateException ignore) {
                     rootDirectory = modelSource.getPath();
+                    while (rootDirectory != null && !Files.isDirectory(rootDirectory)) {
+                        rootDirectory = rootDirectory.getParent();
+                    }
                 }
                 try (InputStream is = modelSource.openStream()) {
                     model = modelProcessor.read(XmlReaderRequest.builder()