diff --git a/git-annex.cabal b/git-annex.cabal
index b662fe482e..b610cdf65c 100644
--- a/git-annex.cabal
+++ b/git-annex.cabal
@@ -333,12 +333,14 @@ Executable git-annex
       P2P.Http.State
 
   if flag(OsPath)
-    Build-Depends:
-      os-string (>= 2.0.0),
-      directory (>= 1.3.8.3),
-      filepath (>= 1.5.2.0),
-      file-io (>= 0.1.3)
-    CPP-Options: -DWITH_OSPATH
+    -- Currently this build flag does not pass the test suite on Windows
+    if (! os(windows))
+      Build-Depends:
+        os-string (>= 2.0.0),
+        directory (>= 1.3.8.3),
+        filepath (>= 1.5.2.0),
+        file-io (>= 0.1.3)
+      CPP-Options: -DWITH_OSPATH
 
   if (os(windows))
     Build-Depends: