diff --git a/libreoffice-help-en-US.spec b/libreoffice-help-en-US.spec
index f65f7bd..0716f7b 100644
--- a/libreoffice-help-en-US.spec
+++ b/libreoffice-help-en-US.spec
@@ -214,6 +214,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"
diff --git a/libreoffice-help-en-US.spec.in b/libreoffice-help-en-US.spec.in
index 49dd243..2a48af0 100644
--- a/libreoffice-help-en-US.spec.in
+++ b/libreoffice-help-en-US.spec.in
@@ -210,6 +210,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"
diff --git a/libreoffice-help-group1.spec b/libreoffice-help-group1.spec
index 1a9e687..aa303e8 100644
--- a/libreoffice-help-group1.spec
+++ b/libreoffice-help-group1.spec
@@ -309,6 +309,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"
diff --git a/libreoffice-help-group2.spec b/libreoffice-help-group2.spec
index 7e14455..89676ca 100644
--- a/libreoffice-help-group2.spec
+++ b/libreoffice-help-group2.spec
@@ -327,6 +327,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"
diff --git a/libreoffice-help-group3.spec b/libreoffice-help-group3.spec
index c431240..e6db23c 100644
--- a/libreoffice-help-group3.spec
+++ b/libreoffice-help-group3.spec
@@ -366,6 +366,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"
diff --git a/libreoffice-help-group4.spec b/libreoffice-help-group4.spec
index 1ed3b14..d748e04 100644
--- a/libreoffice-help-group4.spec
+++ b/libreoffice-help-group4.spec
@@ -300,6 +300,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"
diff --git a/libreoffice-help-group5.spec b/libreoffice-help-group5.spec
index 2e87778..167b971 100644
--- a/libreoffice-help-group5.spec
+++ b/libreoffice-help-group5.spec
@@ -354,6 +354,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"
diff --git a/libreoffice-help-groupX.spec.in b/libreoffice-help-groupX.spec.in
index d705428..b57f772 100644
--- a/libreoffice-help-groupX.spec.in
+++ b/libreoffice-help-groupX.spec.in
@@ -186,6 +186,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"
diff --git a/libreoffice.spec b/libreoffice.spec
index 25d3427..a573a63 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -1412,6 +1412,8 @@ fi
 # parallel build of modules
 # it makes sense on machines with more CPUs
 num_cpus=`grep ^processor /proc/cpuinfo | wc -l`
+# again reduce to 64 CPUs because of dmake
+test "$num_cpus" -gt "64" && num_cpus="64" && echo "Warning: dmake does not support more than 64 processes => reducing number of used cpus"
 # allow only 2 modules if there more jobs allowed in one module
 test -n "$lo_jobs" -a "$lo_jobs" -gt 1 && num_cpus="2"
 PARALLEL_BUILD="$PARALLEL_BUILD --with-num-cpus=$num_cpus"