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-rw-r--r--gnu/packages/xfce.scm2
1 files changed, 1 insertions, 1 deletions
diff --git a/gnu/packages/xfce.scm b/gnu/packages/xfce.scm
index 20b679c0df..126ba19b1a 100644
--- a/gnu/packages/xfce.scm
+++ b/gnu/packages/xfce.scm
@@ -437,7 +437,7 @@ matching them against regular expressions.")
                                     "/include/dbus-1.0" ":"
                                     (assoc-ref inputs "dbus")
                                     "/include/dbus-1.0" ":"
-                                    (getenv "C_INCLUDE_PATH")))
+                                    (or (getenv "C_INCLUDE_PATH") "")))
              #t)))))
     (native-inputs
      `(("intltool" ,intltool)