diff --git a/bsc/mcxx/default.nix b/bsc/mcxx/default.nix
index 3913dc1..3dfa1cf 100644
--- a/bsc/mcxx/default.nix
+++ b/bsc/mcxx/default.nix
@@ -4,7 +4,7 @@
 , autoreconfHook
 , nanos6
 , gperf
-, python
+, python3
 , gfortran
 , pkg-config
 , sqlite
@@ -36,7 +36,7 @@ stdenv.mkDerivation rec {
     autoreconfHook
     nanos6
     gperf
-    python
+    python3
     gfortran
     pkg-config
     sqlite.dev
diff --git a/bsc/slurm/pmi2.nix b/bsc/slurm/pmi2.nix
index 332ff02..da9811f 100644
--- a/bsc/slurm/pmi2.nix
+++ b/bsc/slurm/pmi2.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, fetchFromGitHub, pkgconfig, libtool, curl
-, python, munge, perl, pam, openssl
+, python3, munge, perl, pam, openssl
 , ncurses, libmysqlclient, gtk2, lua, hwloc, numactl
 , readline, freeipmi, libssh2, xorg
 , pmix
@@ -35,7 +35,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkgconfig libtool ];
   buildInputs = [
-    curl python munge perl pam openssl
+    curl python3 munge perl pam openssl
       libmysqlclient ncurses gtk2
       lua hwloc numactl readline freeipmi
       pmix