diff --git a/artifacts_win.sh b/artifacts_win.sh
index 39a7e6b..865ca9e 100644
--- a/artifacts_win.sh
+++ b/artifacts_win.sh
@@ -31,95 +31,6 @@ if [ $? -ne 0 ]; then exit 1; fi
 sha256sum.exe librewolf-$pkgver.en-US.win64.zip > librewolf-$pkgver.en-US.win64.zip.sha256sum
 if [ $? -ne 0 ]; then exit 1; fi
 
-
-
-function generate_installer() {
-# generate the .nsi intaller file.
-cat >artifacts_win.nsi <<END
-#
-# Change these values to fit your application...
-#
-
-!define APPNAME "LibreWolf"       # Full app name, like: "Gtk+ 2.0 Hello World"
-!define PROGNAME "librewolf"      # executable name, like: gtk2hello
-!define PROG_VERSION "${pkgver}"     # the program version, like: 0.3.0
-!define ICON_NAME "librewolf.ico" # filename of icon to use for this app
-!define COMPANYNAME "LibreWolf"   # Your name, or company (or just the program name)
-!define ESTIMATED_SIZE 190000     # Estimated size (in KB) of installed program for use in "add or remove programs" / 190 MB
-
-#
-# The actual installer/uninstaller, you should not need to change much here below
-#
-
-Name "\${PROGNAME}"
-OutFile "\${PROGNAME}-\${PROG_VERSION}.en-US.win64-setup.exe"
-InstallDir \$PROGRAMFILES64\\\${APPNAME}
-RequestExecutionLevel admin
-
-Page directory
-Page instfiles
-
-function .onInit
-	setShellVarContext all
-functionEnd
- 
-Section "\${PROGNAME}"
-
-	# Copy files
-	SetOutPath \$INSTDIR
-	File /r librewolf\*.*
-
-	# Start Menu
-	createDirectory "\$SMPROGRAMS\\\${COMPANYNAME}"
-	createShortCut "\$SMPROGRAMS\\\${COMPANYNAME}\\\${APPNAME}.lnk" "\$INSTDIR\\\${PROGNAME}.exe" "" "\$INSTDIR\\\${ICON_NAME}"
-
-	# Uninstaller 
-	writeUninstaller "\$INSTDIR\uninstall.exe"
-
-	# Registry information for add/remove programs
-	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "DisplayName" "\${APPNAME}"
-	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "UninstallString" "\$\\"\$INSTDIR\uninstall.exe\$\\""
-	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "QuietUninstallString" "\$\\"\$INSTDIR\uninstall.exe\$\\" /S"
-	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "InstallLocation" "\$\\"\$INSTDIR\$\\""
-	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "DisplayIcon" "\$\\"\$INSTDIR\\\${ICON_NAME}$\\""
-	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "Publisher" "\${COMPANYNAME}"
-	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "DisplayVersion" "\${PROG_VERSION}"
-	# There is no option for modifying or repairing the install
-	WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "NoModify" 1
-	WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "NoRepair" 1
-	# Set the INSTALLSIZE constant (!defined at the top of this script) so Add/Remove Programs can accurately report the size
-	WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}" "EstimatedSize" \${ESTIMATED_SIZE}
-
-SectionEnd
-
-# Before uninstall, ask for confirmation
-function un.onInit
-	SetShellVarContext all
- 
-	#Verify the uninstaller - last chance to back out
-	MessageBox MB_OKCANCEL "Permanantly remove \${APPNAME}?" IDOK next
-		Abort
-	next:
-functionEnd
-
-# Uninstaller
-section "uninstall"
-
-	# Remove Start Menu launcher
-	delete "\$SMPROGRAMS\\\${COMPANYNAME}\\\${APPNAME}.lnk"
-	# Try to remove the Start Menu folder - this will only happen if it is empty
-	rmDir "\$SMPROGRAMS\\\${COMPANYNAME}"
- 
-	# Remove files
-	rmDir /r \$INSTDIR
-
-	# Remove uninstaller information from the registry
-	DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\\\${COMPANYNAME} \${APPNAME}"
-
-sectionEnd
-END
-}
-
 # now to try to make the installer.
 cp -v common/source_files/browser/branding/librewolf/firefox.ico librewolf/librewolf.ico
 
diff --git a/build.sh b/build.sh
index 0953b71..ac6481b 100755
--- a/build.sh
+++ b/build.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/bash
+#!/bin/sh
 # build.sh - build librewolf on windows
 # derived from https://gitlab.com/librewolf-community/browser/linux/-/blob/master/PKGBUILD
 
@@ -49,8 +49,33 @@ mach_env() {
 }
 
 git_subs() {
+    echo "git_subs: begin."
     git submodule update --recursive
     git submodule foreach git merge origin master
+    echo "git_subs: done."
+}
+
+clean() {
+    echo "clean: begin."
+    
+    echo "Deleting previous firefox-${pkgver} ..."
+    rm -rf firefox-$pkgver
+    
+    echo "Deleting other cruft ..."
+    rm -rf librewolf
+    rm -f firefox-$pkgver.source.tar.xz
+    rm -f *.patch
+    
+    # windows
+    rm -f librewolf-$pkgver.en-US.win64.zip*
+    rm -f librewolf-$pkgver.en-US.win64-setup.exe*
+    rm -f tmp.nsi
+    
+    # linux
+    rm -f librewolf-$pkgver.en-US.deb.zip*
+    rm -f librewolf-$pkgver.en-US.rpm.zip*
+
+    echo "clean: done."
 }
 
 fetch() {
@@ -321,6 +346,10 @@ fi
 
 done_something=0
 
+if [[ "$*" == *clean* ]]; then
+    clean
+    done_something=1
+fi
 if [[ "$*" == *git_subs* ]]; then
     git_subs
     done_something=1
@@ -384,28 +413,37 @@ if (( done_something == 0 )); then
     cat <<EOF
 Use: ./build.sh  fetch extract do_patches build package artifacts_win
 
-    git_subs        - update git submodules
     fetch           - fetch the tarball.
     extract         - extract the tarball.
     do_patches      - create a mozconfig, and patch the source.
     build           - the actual build.
-    artifacts_win   - build the .zip and NSIS setup.exe installer.
+    artifacts_win   - apply .cfg, build the zip file and NSIS setup.exe installer.
 
 Linux related functions:
 
-    mach_env        - create mach build environment.
-    rustup	    - perform a rustup for this user.
     deps_deb	    - install dependencies with apt.
     deps_rpm	    - install dependencies with dnf.
     deps_pkg	    - install dependencies with pkg.
-    artifacts_deb   - create a dist zip file (for debian10).
-    artifacts_rpm   - create a dist zip file (for fedora33).
+    artifacts_deb   - apply .cfg, create a dist zip file (for debian10).
+    artifacts_rpm   - apply .cfg, create a dist zip file (for fedora33).
 
-If no parameters are given, it prints this help message.
+Generic utility functionality:
+
+    clean           - remove generated cruft.
+    git_subs        - update git submodules.
+    mach_env        - create mach build environment.
+    rustup	    - perform a rustup for this user.
+
+Examples:
+  
+    For windows, use:
+      ./build.sh fetch extract do_patches build artifacts_win
+
+    For debian, use: 
+      sudo ./build.sh deps_deb 
+      ./build.sh rustup mach_env
+      ./build.sh fetch extract do_patches build artifacts_deb
 
-For debian, use: 
-  $ sudo ./build.sh deps_deb 
-  $ ./build.sh rustup mach_env fetch extract do_patches build artifacts_deb
 EOF
     exit 1
 fi