diff --git a/_constraints b/_constraints
index c098220..5217115 100644
--- a/_constraints
+++ b/_constraints
@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <constraints>
   <hardware>
     <physicalmemory>
@@ -6,5 +7,8 @@
     <disk>
       <size unit="G">25</size>
     </disk>
+    <memoryperjob>
+      <size unit="M">1200</size>
+    </memoryperjob>
   </hardware>
 </constraints>
diff --git a/libreoffice.changes b/libreoffice.changes
index 768a4d8..4afb5d2 100644
--- a/libreoffice.changes
+++ b/libreoffice.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Aug 20 08:55:05 UTC 2020 - Martin Liška <mliska@suse.cz>
+
+- Use memoryperjob constraint instead of %limit_build macro.
+
 -------------------------------------------------------------------
 Mon Aug 17 06:42:35 UTC 2020 - Tomáš Chvátal <tchvatal@suse.com>
 
diff --git a/libreoffice.spec b/libreoffice.spec
index b289ebf..4df6d19 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -147,7 +147,6 @@ BuildRequires:  libserializer
 BuildRequires:  libtool
 BuildRequires:  lpsolve-devel
 BuildRequires:  make
-BuildRequires:  memory-constraints
 BuildRequires:  openldap2-devel
 BuildRequires:  pentaho-libxml
 BuildRequires:  pentaho-reporting-flow-engine
@@ -1000,7 +999,6 @@ echo "HTML_TIMESTAMP = NO" >> odk/docs/idl/Doxyfile
 # Strip lto from %_lto_cflags as the project has --enable-lto option
 %define _lto_cflags %{nil}
 # do not eat all memory
-%limit_build -m 1200
 # make sure that JAVA_HOME is set correctly
 source %{_sysconfdir}/profile.d/alljava.sh
 # use RPM_OPT_FLAGS, ...