diff --git a/dtool/Config.pp b/dtool/Config.pp
index 7600864cf0..ffd37f9d21 100644
--- a/dtool/Config.pp
+++ b/dtool/Config.pp
@@ -510,6 +510,10 @@
   #define USE_COMPILER GCC
 #endif
 
+// Permission masks to install data and executable files,
+// respectively.  This is only meaningful for Unix systems.
+#define INSTALL_UMASK_DATA 644
+#define INSTALL_UMASK_PROG 755
 
 // How to invoke bison and flex.  Panda takes advantage of some
 // bison/flex features, and therefore specifically requires bison and
@@ -660,8 +664,8 @@
 // a running program without crashing the running instance.  However,
 // it doesn't understanding installing a program from a subdirectory,
 // so we have to cd into the source directory first.
-#defer INSTALL $[if $[ne $[dir $[local]], ./],cd ./$[dir $[local]] &&] install -m 666 $[notdir $[local]] $[dest]
-#defer INSTALL_PROG $[if $[ne $[dir $[local]], ./],cd ./$[dir $[local]] &&] install -m 777 $[notdir $[local]] $[dest]
+#defer INSTALL $[if $[ne $[dir $[local]], ./],cd ./$[dir $[local]] &&] install -m $[INSTALL_UMASK_DATA] $[notdir $[local]] $[dest]/
+#defer INSTALL_PROG $[if $[ne $[dir $[local]], ./],cd ./$[dir $[local]] &&] install -m $[INSTALL_UMASK_PROG] $[notdir $[local]] $[dest]/
 
 // Variable definitions for building with the Irix MIPSPro compiler.
 #if $[eq $[USE_COMPILER], MIPS]
diff --git a/dtool/pptempl/Template.gmsvc.pp b/dtool/pptempl/Template.gmsvc.pp
index 1eabdf3969..35c579c360 100644
--- a/dtool/pptempl/Template.gmsvc.pp
+++ b/dtool/pptempl/Template.gmsvc.pp
@@ -423,19 +423,19 @@ $[TAB] rm -f $[sort $[installed_files]]
 $[install_lib_dir]/$[get_dllname $[TARGET]].$[dlllib] : $[ODIR]/$[get_dllname $[TARGET]].$[dlllib]
 #define local $[get_dllname $[TARGET]].$[dlllib]
 #define dest $[install_lib_dir]
-$[TAB] cp -f $[ODIR]/$[local] $[dest]
+$[TAB] cp -f $[ODIR]/$[local] $[dest]/
 #endif
 
 $[install_lib_dir]/$[get_dllname $[TARGET]].lib : $[ODIR]/$[get_dllname $[TARGET]].lib
 #define local $[get_dllname $[TARGET]].lib
 #define dest $[install_lib_dir]
-$[TAB] cp -f $[ODIR]/$[local] $[dest]
+$[TAB] cp -f $[ODIR]/$[local] $[dest]/
 
 #if $[and $[build_dlls],$[build_pdbs]]
 $[install_lib_dir]/$[get_dllname $[TARGET]].pdb : $[ODIR]/$[get_dllname $[TARGET]].pdb
 #define local $[get_dllname $[TARGET]].pdb
 #define dest $[install_lib_dir]
-$[TAB] cp -f $[ODIR]/$[local] $[dest]
+$[TAB] cp -f $[ODIR]/$[local] $[dest]/
 #endif
 
 #if $[igatescan]
@@ -454,7 +454,7 @@ $[TAB] cp -f $[ODIR]/$[local] $[dest]
 $[igatedb:$[ODIR]/%=$[install_igatedb_dir]/%] : $[igatedb]
 #define local $[igatedb]
 #define dest $[install_igatedb_dir]
-$[TAB] cp -f $[local] $[dest]
+$[TAB] cp -f $[local] $[dest]/
 
 // We have to split this out as a separate rule to properly support
 // parallel make.
@@ -606,7 +606,7 @@ $[TAB] rm -f $[sort $[installed_files]]
 $[install_lib_dir]/$[get_dllname $[TARGET]].lib : $[ODIR]/$[get_dllname $[TARGET]].lib
 #define local $[get_dllname $[TARGET]].lib
 #define dest $[install_lib_dir]
-$[TAB] cp -f $[ODIR]/$[local] $[dest]
+$[TAB] cp -f $[ODIR]/$[local] $[dest]/
 
 #end static_lib_target ss_lib_target
 
@@ -641,7 +641,7 @@ $[TAB] rm -f $[sort $[installed_files]]
 #define local $[TARGET]
 #define dest $[install_bin_dir]
 $[install_bin_dir]/$[TARGET] : $[ODIR]/$[TARGET]
-$[TAB] cp -f $[ODIR]/$[local] $[dest]
+$[TAB] cp -f $[ODIR]/$[local] $[dest]/
 
 #end sed_bin_target
 
@@ -695,13 +695,13 @@ $[TAB] rm -f $[sort $[installed_files]]
 $[install_bin_dir]/$[TARGET].exe : $[ODIR]/$[TARGET].exe
 #define local $[TARGET].exe
 #define dest $[install_bin_dir]
-$[TAB] cp -f $[ODIR]/$[local] $[dest]
+$[TAB] cp -f $[ODIR]/$[local] $[dest]/
 
 #if $[build_pdbs]
 $[install_bin_dir]/$[TARGET].pdb : $[ODIR]/$[TARGET].pdb
 #define local $[TARGET].pdb
 #define dest $[install_bin_dir]
-$[TAB] cp -f $[ODIR]/$[local] $[dest]
+$[TAB] cp -f $[ODIR]/$[local] $[dest]/
 #endif
 
 #if $[bin_postprocess_target]
@@ -713,7 +713,7 @@ $[TAB] rm -f $[output_exe]
 $[TAB] $[bin_postprocess_cmd] $[bin_postprocess_arg1] $[input_exe] $[bin_postprocess_arg2] $[output_exe]
 
 $[install_bin_dir]/$[bin_postprocess_target].exe : $[output_exe]
-$[TAB] cp -f $[output_exe] $[install_bin_dir]
+$[TAB] cp -f $[output_exe] $[install_bin_dir]/
 #endif
 
 #end bin_target
@@ -846,42 +846,42 @@ $[TAB] $[COMPILE_C++]
 $[install_bin_dir]/$[file] : $[file]
 #define local $[file]
 #define dest $[install_bin_dir]
-$[TAB] cp -f $[local] $[dest]
+$[TAB] cp -f $[local] $[dest]/
 #end file
 
 #foreach file $[install_headers]
 $[install_headers_dir]/$[file] : $[file]
 #define local $[file]
 #define dest $[install_headers_dir]
-$[TAB] cp -f $[local] $[dest]
+$[TAB] cp -f $[local] $[dest]/
 #end file
 
 #foreach file $[install_parser_inc]
 $[install_parser_inc_dir]/$[file] : $[file]
 #define local $[file]
 #define dest $[install_parser_inc_dir]
-$[TAB] cp -f $[local] $[dest]
+$[TAB] cp -f $[local] $[dest]/
 #end file
 
 #foreach file $[install_data]
 $[install_data_dir]/$[file] : $[file]
 #define local $[file]
 #define dest $[install_data_dir]
-$[TAB] cp -f $[local] $[dest]
+$[TAB] cp -f $[local] $[dest]/
 #end file
 
 #foreach file $[install_config]
 $[install_config_dir]/$[file] : $[file]
 #define local $[file]
 #define dest $[install_config_dir]
-$[TAB] cp -f $[local] $[dest]
+$[TAB] cp -f $[local] $[dest]/
 #end file
 
 #foreach file $[install_py]
 $[install_py_dir]/$[file] : $[file]
 #define local $[file]
 #define dest $[install_py_dir]
-$[TAB] $[INSTALL]
+$[TAB] cp -f $[local] $[dest]/
 #end file
 
 #if $[install_py]
@@ -1037,7 +1037,7 @@ $[TAB] @test -d $[install_headers_dir] || mkdir -p $[install_headers_dir]
 $[install_headers_dir]/$[CONFIG_HEADER] : $[CONFIG_HEADER]
 #define local $[CONFIG_HEADER]
 #define dest $[install_headers_dir]
-$[TAB] cp -f $[local] $[dest]
+$[TAB] cp -f $[local] $[dest]/
 #endif
 
 #end Makefile