NSIS - Change $INSTDIR to a custom path

Electron Builder - 19.22.1 Target - NSIS

I’m trying to change the default installation directory to custom(Ex: C:\MyApp) and remove default(C:\Program Files\MyApp). package.json

{
    "win": {
      "target": "NSIS",
      "icon": "build/icon.ico"
    },
    "nsis": {
      "oneClick": false,
      "allowElevation": true,
      "allowToChangeInstallationDirectory": true,
      "createDesktopShortcut": true,
      "include": "build/installer.nsh"
    }
}

I used !macro preInit, but didn’t work: build/installer.nsh

!macro preInit
  StrCpy $INSTDIR "C:\MyApp"
!macroend

error

command StrCpy not valid outside Section or Function

It is possible to change default installation do C:\MyApp even if installer have only in elevation mode?

[Kelerchian]

@hemavidal @develar Just letting you know guys: This would make autoUpdate always install to “C:\MyApp” (or your designated default dir) It happens on electron-builder 20.4.1.

Steps to reproduce:

1. Make to version of your app, e.g. v0.1.0 and v.0.1.1
2. Install v0.1.0 on somewhere other than “C:\MyApp”, for example “C:\MyAppp”
3. Let the autoupdate run.
4. Autoupdate will install on “C:\MyApp”

[hemavidal]

I resolved with this:

!macro preInit
	SetRegView 64
	WriteRegExpandStr HKLM "${INSTALL_REGISTRY_KEY}" InstallLocation "C:\MyApp"
	WriteRegExpandStr HKCU "${INSTALL_REGISTRY_KEY}" InstallLocation "C:\MyApp"
	SetRegView 32
	WriteRegExpandStr HKLM "${INSTALL_REGISTRY_KEY}" InstallLocation "C:\MyApp"
	WriteRegExpandStr HKCU "${INSTALL_REGISTRY_KEY}" InstallLocation "C:\MyApp"
!macroend