From 2c5b2c5c5036539169b541dc93f72e167131d345 Mon Sep 17 00:00:00 2001
From: Johannes Schumann <johannes.schumann@fau.de>
Date: Sat, 12 Dec 2020 03:40:08 +0100
Subject: [PATCH] Fix import logic

---
 km3buu/output.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/km3buu/output.py b/km3buu/output.py
index 5d89d83..c15df73 100644
--- a/km3buu/output.py
+++ b/km3buu/output.py
@@ -31,7 +31,7 @@ from .config import Config, read_default_media_compositions
 try:
     import ROOT
     libpath = environ.get("KM3NET_LIB")
-    if libpath:
+    if libpath is None:
         libpath = Config().km3net_lib_path
     if ROOT.gSystem.Load(join(libpath, "libKM3NeTROOT.so")) != 0:
         raise ModuleNotFoundError("KM3NeT dataformat library not found!")
-- 
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