diff --git a/src/make.tcl b/src/make.tcl
index 56f2608a..8247343f 100644
--- a/src/make.tcl
+++ b/src/make.tcl
@@ -2458,17 +2458,21 @@ proc ::punkboot::lib::runtime_buildcopyname {runtime} {
 }
 
 set runtimes [list]
-if {[file dirname [info nameofexecutable]] eq $rtfolder} {
+if {[file dirname [info nameofexecutable]] eq $rtfolder && [file isdirectory [info nameofexecutable]]} {
+    #info name will only appear to be a directory when the runtime is a tclkit that is mounted at the same path as the physical file.
+    #This is not a problem for zip based kits.
     #fix so that we can find and use a runtime tclkit that is currently in use as the runtime that is running this script.
     # - when the current runtime is using a runtime in the rtfolder that is a tclkit, it is mounted at the same path as the physical file and so appears to Tcl as if it's a directory.
     # - use external filesystem tools to make a copy of the file
     if {$::tcl_platform(platform) eq "windows"} {
         #exec cmd /c copy [info nameofexecutable] $rtfolder/[file rootname [file tail [info nameofexecutable]]]_BUILDCOPY.exe
-        exec cmd /c copy [info nameofexecutable] $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]
+        exec cmd /c copy [file nativename [info nameofexecutable]] [file nativename $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]]
     } else {
         #exec cp [info nameofexecutable] $rtfolder/[file tail [info nameofexecutable]]_BUILDCOPY
         exec cp [info nameofexecutable] $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]
     }
+    #we need to add the base name of the current exe to the runtimes list because the next section will look for files in the runtime folder
+    #and won't find the mounted runtime since it's mounted as a directory.
     lappend runtimes [file tail [info nameofexecutable]]
 }
 
@@ -2627,7 +2631,7 @@ foreach runtime [dict keys $runtime_vfs_map] {
 
     #invoke can fail if runtime not an executable file for the current platform
     if {[file type $rtfolder/$runtime] eq "directory"} {
-        #assume it's a mounted tclkit (because tcl kits mount in same place as their underlying path and mask the executable)
+        #assume it's a mounted tclkit (because tcl kits mount in same place as their underlying path and mask the executable as a directory)
         #use the BUILDCOPY created above - REVIEW
         if {$::tcl_platform(platform) eq "windows"} {
             set useruntime [file rootname $runtime]_BUILDCOPY.exe
diff --git a/src/project_layouts/custom/_project/punk.basic/src/make.tcl b/src/project_layouts/custom/_project/punk.basic/src/make.tcl
index 56f2608a..1a35d8a5 100644
--- a/src/project_layouts/custom/_project/punk.basic/src/make.tcl
+++ b/src/project_layouts/custom/_project/punk.basic/src/make.tcl
@@ -2458,13 +2458,15 @@ proc ::punkboot::lib::runtime_buildcopyname {runtime} {
 }
 
 set runtimes [list]
-if {[file dirname [info nameofexecutable]] eq $rtfolder} {
+if {[file dirname [info nameofexecutable]] eq $rtfolder && [file isdirectory [info nameofexecutable]]} {
+    #info name will only appear to be a directory when the runtime is a tclkit that is mounted at the same path as the physical file.
+    #This is not a problem for zip based kits.
     #fix so that we can find and use a runtime tclkit that is currently in use as the runtime that is running this script.
     # - when the current runtime is using a runtime in the rtfolder that is a tclkit, it is mounted at the same path as the physical file and so appears to Tcl as if it's a directory.
     # - use external filesystem tools to make a copy of the file
     if {$::tcl_platform(platform) eq "windows"} {
         #exec cmd /c copy [info nameofexecutable] $rtfolder/[file rootname [file tail [info nameofexecutable]]]_BUILDCOPY.exe
-        exec cmd /c copy [info nameofexecutable] $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]
+        exec cmd /c copy [file nativename [info nameofexecutable]] [file nativename $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]]
     } else {
         #exec cp [info nameofexecutable] $rtfolder/[file tail [info nameofexecutable]]_BUILDCOPY
         exec cp [info nameofexecutable] $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]
@@ -2627,7 +2629,7 @@ foreach runtime [dict keys $runtime_vfs_map] {
 
     #invoke can fail if runtime not an executable file for the current platform
     if {[file type $rtfolder/$runtime] eq "directory"} {
-        #assume it's a mounted tclkit (because tcl kits mount in same place as their underlying path and mask the executable)
+        #assume it's a mounted tclkit (because tcl kits mount in same place as their underlying path and mask the executable as a directory)
         #use the BUILDCOPY created above - REVIEW
         if {$::tcl_platform(platform) eq "windows"} {
             set useruntime [file rootname $runtime]_BUILDCOPY.exe
diff --git a/src/project_layouts/custom/_project/punk.project-0.1/src/make.tcl b/src/project_layouts/custom/_project/punk.project-0.1/src/make.tcl
index 56f2608a..1a35d8a5 100644
--- a/src/project_layouts/custom/_project/punk.project-0.1/src/make.tcl
+++ b/src/project_layouts/custom/_project/punk.project-0.1/src/make.tcl
@@ -2458,13 +2458,15 @@ proc ::punkboot::lib::runtime_buildcopyname {runtime} {
 }
 
 set runtimes [list]
-if {[file dirname [info nameofexecutable]] eq $rtfolder} {
+if {[file dirname [info nameofexecutable]] eq $rtfolder && [file isdirectory [info nameofexecutable]]} {
+    #info name will only appear to be a directory when the runtime is a tclkit that is mounted at the same path as the physical file.
+    #This is not a problem for zip based kits.
     #fix so that we can find and use a runtime tclkit that is currently in use as the runtime that is running this script.
     # - when the current runtime is using a runtime in the rtfolder that is a tclkit, it is mounted at the same path as the physical file and so appears to Tcl as if it's a directory.
     # - use external filesystem tools to make a copy of the file
     if {$::tcl_platform(platform) eq "windows"} {
         #exec cmd /c copy [info nameofexecutable] $rtfolder/[file rootname [file tail [info nameofexecutable]]]_BUILDCOPY.exe
-        exec cmd /c copy [info nameofexecutable] $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]
+        exec cmd /c copy [file nativename [info nameofexecutable]] [file nativename $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]]
     } else {
         #exec cp [info nameofexecutable] $rtfolder/[file tail [info nameofexecutable]]_BUILDCOPY
         exec cp [info nameofexecutable] $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]
@@ -2627,7 +2629,7 @@ foreach runtime [dict keys $runtime_vfs_map] {
 
     #invoke can fail if runtime not an executable file for the current platform
     if {[file type $rtfolder/$runtime] eq "directory"} {
-        #assume it's a mounted tclkit (because tcl kits mount in same place as their underlying path and mask the executable)
+        #assume it's a mounted tclkit (because tcl kits mount in same place as their underlying path and mask the executable as a directory)
         #use the BUILDCOPY created above - REVIEW
         if {$::tcl_platform(platform) eq "windows"} {
             set useruntime [file rootname $runtime]_BUILDCOPY.exe
diff --git a/src/project_layouts/custom/_project/punk.shell-0.1/src/make.tcl b/src/project_layouts/custom/_project/punk.shell-0.1/src/make.tcl
index 56f2608a..1a35d8a5 100644
--- a/src/project_layouts/custom/_project/punk.shell-0.1/src/make.tcl
+++ b/src/project_layouts/custom/_project/punk.shell-0.1/src/make.tcl
@@ -2458,13 +2458,15 @@ proc ::punkboot::lib::runtime_buildcopyname {runtime} {
 }
 
 set runtimes [list]
-if {[file dirname [info nameofexecutable]] eq $rtfolder} {
+if {[file dirname [info nameofexecutable]] eq $rtfolder && [file isdirectory [info nameofexecutable]]} {
+    #info name will only appear to be a directory when the runtime is a tclkit that is mounted at the same path as the physical file.
+    #This is not a problem for zip based kits.
     #fix so that we can find and use a runtime tclkit that is currently in use as the runtime that is running this script.
     # - when the current runtime is using a runtime in the rtfolder that is a tclkit, it is mounted at the same path as the physical file and so appears to Tcl as if it's a directory.
     # - use external filesystem tools to make a copy of the file
     if {$::tcl_platform(platform) eq "windows"} {
         #exec cmd /c copy [info nameofexecutable] $rtfolder/[file rootname [file tail [info nameofexecutable]]]_BUILDCOPY.exe
-        exec cmd /c copy [info nameofexecutable] $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]
+        exec cmd /c copy [file nativename [info nameofexecutable]] [file nativename $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]]
     } else {
         #exec cp [info nameofexecutable] $rtfolder/[file tail [info nameofexecutable]]_BUILDCOPY
         exec cp [info nameofexecutable] $rtfolder/[punkboot::lib::runtime_buildcopyname [info nameofexecutable]]
@@ -2627,7 +2629,7 @@ foreach runtime [dict keys $runtime_vfs_map] {
 
     #invoke can fail if runtime not an executable file for the current platform
     if {[file type $rtfolder/$runtime] eq "directory"} {
-        #assume it's a mounted tclkit (because tcl kits mount in same place as their underlying path and mask the executable)
+        #assume it's a mounted tclkit (because tcl kits mount in same place as their underlying path and mask the executable as a directory)
         #use the BUILDCOPY created above - REVIEW
         if {$::tcl_platform(platform) eq "windows"} {
             set useruntime [file rootname $runtime]_BUILDCOPY.exe