From 1baa309252c69c758a07d17a50e938704aa729dc Mon Sep 17 00:00:00 2001
From: Fabian Neumann <fabian.neumann@outlook.de>
Date: Fri, 4 Dec 2020 18:44:34 +0100
Subject: [PATCH] travis: ipopt 3.13.3 does not provide windows executables

https://github.com/conda-forge/ipopt-feedstock/issues/55
---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index a6a29a396..5b06a779b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,7 +24,7 @@ before_install:
   - conda activate pypsa-eur
 
   # install open-source solver
-  - mamba install -c conda-forge glpk ipopt
+  - mamba install -c conda-forge glpk ipopt<3.13.3
 
   # list packages for easier debugging
   - conda list