From da1f19cba51edeccdabd57314b9d836ffc52c43d Mon Sep 17 00:00:00 2001
From: David Rafferty <drafferty@hs.uni-hamburg.de>
Date: Mon, 14 Dec 2020 11:17:59 +0100
Subject: [PATCH] Exclude astropy 4.x to avoid installation problems

---
 setup.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/setup.py b/setup.py
index 0901b20..81b22d3 100644
--- a/setup.py
+++ b/setup.py
@@ -17,8 +17,9 @@ else:
 if sys.version_info < (3, 0):
     reqlist = ['numpy', 'astropy >= 0.4, <3.0']
 else:
-    # Require astropy v3.2 or later to get much faster copies
-    reqlist = ['numpy', 'astropy >= 3.2']
+    # Require astropy v3.2 or later to get much faster copies (4.x can cause some
+    # installation problems, so exclude for now)
+    reqlist = ['numpy', 'astropy >= 3.2, <4.0']
 if build_c_extentions:
     reqlist.append('pybind11>=2.2.0')
     ext_modules = [Extension('lsmtool.operations._grouper',
-- 
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