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-rw-r--r--nixpkgs/pkgs/development/python-modules/lammps-cython/default.nix4
1 files changed, 2 insertions, 2 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/lammps-cython/default.nix b/nixpkgs/pkgs/development/python-modules/lammps-cython/default.nix
index 501e4adc21d..df2a122d068 100644
--- a/nixpkgs/pkgs/development/python-modules/lammps-cython/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/lammps-cython/default.nix
@@ -9,7 +9,7 @@
, pymatgen
, ase
, pytestrunner
-, pytest
+, pytest_4
, pytestcov
, isPy3k
, openssh
@@ -26,7 +26,7 @@ buildPythonPackage rec {
};
buildInputs = [ cython pytestrunner ];
- checkInputs = [ pytest pytestcov openssh ];
+ checkInputs = [ pytest_4 pytestcov openssh ];
propagatedBuildInputs = [ mpi4py pymatgen ase numpy ];
preBuild = ''