diff --git a/build/windows/installer/compile.bat b/build/windows/installer/compile.bat
index 0def1e3d22..7bd3bcefec 100755
--- a/build/windows/installer/compile.bat
+++ b/build/windows/installer/compile.bat
@@ -4,11 +4,16 @@ if [%2]==[] goto help
 if [%3]==[] goto help
 if [%4]==[] goto help
 set VER=%~1
-set GIMPDIR=%~2
-set DIR32=%~3
-set DIR64=%~4
+set GIMP_BASE=%~2
+set GIMP32=%~3
+set GIMP64=%~4
+set DEPS_BASE=%~5
+set DEPS32=%~6
+set DEPS64=%~7
 
+if [%INNOPATH%]==[] (
 FOR /F "usebackq tokens=5,* skip=2" %%A IN (`REG QUERY "HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall\Inno Setup 5_is1" /v "Inno Setup: App Path" /reg:32`) DO set INNOPATH=%%B
+)
 if not exist "%INNOPATH%\iscc.exe" goto noinno
 
 ::i'd use %*, but shift has no effect on it
@@ -16,6 +21,9 @@ shift
 shift
 shift
 shift
+shift
+shift
+shift
 set PARAMS=
 :doparams
 if "%1"=="" goto paramsdone
@@ -24,13 +32,14 @@ shift
 goto doparams
 :paramsdone
 
-"%INNOPATH%\iscc.exe" -DVERSION="%VER%" -DGIMP_DIR="%GIMPDIR%" -DDIR32="%DIR32%" -DDIR64="%DIR64%" %PARAMS% gimp3264.iss
+"%INNOPATH%\iscc.exe" -DVERSION="%VER%" -DGIMP_DIR="%GIMP_BASE%" -DDIR32="%GIMP32%" -DDIR64="%GIMP64%" -DDEPS_DIR="%DEPS_BASE%" -DDDIR32="%DEPS32%" -DDDIR64="%DEPS64%" %PARAMS% gimp3264.iss
 goto :eof
 
 :help
-echo Usage: %~n0%~x0 ver.si.on base_dir gimp_x86_dir gimp_x64_dir
-echo Example: %~n0%~x0 2.9.4 X:\gimp-output\2.9-dev gimp-dev-i686-2016-10-08 gimp-dev-x86_64-2016-10-08 
+echo Usage: %~n0%~x0 ver.si.on gimp_base_dir gimp_x86_dir gimp_x64_dir deps_base_dir deps_x86_dir deps_x64_dir [iscc_parameters]
+echo Example: %~n0%~x0 2.9.4 X:\gimp-output\2.9-dev x86 x64 x:\gimp-deps x86 x64 -DPYTHON -DDEBUG_SYMBOLS
 goto :eof
 :noinno
-echo Inno Setup path could not be read from Registry
+echo Inno Setup path could not be read from Registry - install Inno Setup or set INNOPATH environment variable pointing at it's
+echo install directory
 goto :eof