diff --git a/nextflow/src/org/labkey/nextflow/pipeline/NextFlowPipelineJob.java b/nextflow/src/org/labkey/nextflow/pipeline/NextFlowPipelineJob.java
index 40455d8c..a09f7571 100644
--- a/nextflow/src/org/labkey/nextflow/pipeline/NextFlowPipelineJob.java
+++ b/nextflow/src/org/labkey/nextflow/pipeline/NextFlowPipelineJob.java
@@ -68,7 +68,7 @@ private static Path createConfig(Path configTemplate, Path parentDir, Path jobDi
             template = PageFlowUtil.getStreamContentsAsString(in);
         }
 
-        String webdavUrl = FileContentService.get().getWebDavUrl(parentDir, container, FileContentService.PathType.full);
+        String webdavUrl = FileContentService.get().getWebDavUrl(parentDir, container, FileContentService.PathType.full).toString();
         webdavUrl = StringUtils.stripEnd(webdavUrl, "/");
 
         String substitutedContent = template.replace("${quant_spectra_dir}", "quant_spectra_dir = '" + webdavUrl + "'");