diff --git a/_constraints b/_constraints
index 1138b75..a6a4866 100644
--- a/_constraints
+++ b/_constraints
@@ -1,13 +1,7 @@
 <constraints>
-  <overwrite>
-    <conditions>
-      <arch>ppc64</arch>
-      <arch>ppc64le</arch>
-    </conditions>
-    <hardware>
-      <disk>
-        <size unit="M">5100</size>
-      </disk>
-    </hardware>
-  </overwrite>
+  <hardware>
+    <disk>
+      <size unit="G">6</size>
+    </disk>
+  </hardware>
 </constraints>
diff --git a/kst.changes b/kst.changes
index 7f7985f..e497849 100644
--- a/kst.changes
+++ b/kst.changes
@@ -1,3 +1,14 @@
+-------------------------------------------------------------------
+Fri Jan  6 16:35:08 UTC 2023 - Christophe Marin <christophe@krop.fr>
+
+- Update build constraints
+
+-------------------------------------------------------------------
+Fri Jan  6 12:41:00 UTC 2023 - Dominique Leuenberger <dimstar@opensuse.org>
+
+- Drop libnetcdf BuildRequires: this seems not to be required (and
+  does no longer exist).
+
 -------------------------------------------------------------------
 Thu Dec 15 07:37:04 UTC 2022 - Dominique Leuenberger <dimstar@opensuse.org>
 
diff --git a/kst.spec b/kst.spec
index c05168a..3623eb4 100644
--- a/kst.spec
+++ b/kst.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package kst
 #
-# Copyright (c) 2022 SUSE LLC
+# Copyright (c) 2023 SUSE LLC
 # Copyright (c) 2011 Christian Trippe ctrippe@opensuse.org
 #
 # All modifications and additions to the file contributed by third parties
@@ -36,7 +36,6 @@ BuildRequires:  cmake
 BuildRequires:  fdupes
 BuildRequires:  gsl-devel
 BuildRequires:  libmatio-devel
-BuildRequires:  libnetcdf
 BuildRequires:  libnetcdf_c++-devel
 BuildRequires:  libqt5-linguist
 BuildRequires:  netcdf-devel
@@ -49,7 +48,6 @@ BuildRequires:  cmake(Qt5PrintSupport)
 BuildRequires:  cmake(Qt5Widgets)
 BuildRequires:  cmake(Qt5Xml)
 BuildRequires:  pkgconfig(cfitsio)
-Requires:       libnetcdf
 Obsoletes:      python-kst < %{version}
 
 %description