diff --git a/src/GPU/Package.sh b/src/GPU/Package.sh
new file mode 100644
index 000000000..d3d43271c
--- /dev/null
+++ b/src/GPU/Package.sh
@@ -0,0 +1,20 @@
+# Update package files in LAMMPS
+# cp package file to src if doesn't exist or is different
+# do not copy gayberne files if non-GPU version does not exist
+
+for file in *.cpp *.h; do
+  if (test $file == pair_gayberne_gpu.cpp -a ! -e ../pair_gayberne.cpp) then
+    continue
+  fi
+  if (test $file == pair_gayberne_gpu.h -a ! -e ../pair_gayberne.cpp) then
+    continue
+  fi
+
+  if (test ! -e ../$file) then
+    echo "  creating src/$file"
+    cp $file ..
+  elif (test "`diff --brief $file ../$file`" != "") then
+    echo "  updating src/$file"
+    cp $file ..
+  fi
+done
diff --git a/src/OPT/Package.sh b/src/OPT/Package.sh
new file mode 100644
index 000000000..4780f3a93
--- /dev/null
+++ b/src/OPT/Package.sh
@@ -0,0 +1,38 @@
+# Update package files in LAMMPS
+# cp package file to src if doesn't exist or is different
+# do not copy eam and charmm files if non-OPT versions do not exist
+
+for file in *.cpp *.h; do
+  if (test $file == pair_eam_opt.cpp -a ! -e ../pair_eam.cpp) then
+    continue
+  fi
+  if (test $file == pair_eam_opt.h -a ! -e ../pair_eam.cpp) then
+    continue
+  fi
+  if (test $file == pair_eam_alloy_opt.cpp -a ! -e ../pair_eam.cpp) then
+    continue
+  fi
+  if (test $file == pair_eam_alloy_opt.h -a ! -e ../pair_eam.cpp) then
+    continue
+  fi
+  if (test $file == pair_eam_fs_opt.cpp -a ! -e ../pair_eam.cpp) then
+    continue
+  fi
+  if (test $file == pair_eam_fs_opt.h -a ! -e ../pair_eam.cpp) then
+    continue
+  fi
+  if (test $file == pair_lj_charmm_coul_long_opt.cpp -a ! -e ../pair_lj_charmm_coul_long.cpp) then
+    continue
+  fi
+  if (test $file == pair_lj_charmm_coul_long_opt.h -a ! -e ../pair_lj_charmm_coul_long.cpp) then
+    continue
+  fi
+
+  if (test ! -e ../$file) then
+    echo "  creating src/$file"
+    cp $file ..
+  elif (test "`diff --brief $file ../$file`" != "") then
+    echo "  updating src/$file"
+    cp $file ..
+  fi
+done