anchor.diff:  
   @echo Packaging frontend
   call npm run package -- --icon installers/icons/64x64
  -@if %errorlevel% neq 0 (@echo FAILED: npm run package -- --icon installers/icons/64x64
  +@if %errorlevel% neq 0 (@echo FAILED: Failed to package the frontend
   	exit /b 1)
  -
   pushd installers
       @echo Installing stack
  -    powershell -Command "try { $wc = New-Object net.webclient; $wc.Downloadfile('http://www.stackage.org/stack/windows-x86_64', 'stack.zip'); } catch { exit 1; }"
  -    @if %errorlevel% neq 0 (@echo powershell -Command "try { $wc = New-Object net.webclient; $wc.Downloadfile('http://www.stackage.org/stack/windows-x86_64', 'stack.zip'); } catch { exit 1; }"
  +    ..\curl http://www.stackage.org/stack/windows-x86_64 -o stack.zip
  +    @if %errorlevel% neq 0 (@echo FAILED: stack couldn't be obtained
   	popd & exit /b 1)
       del /f stack.exe
       7z x stack.zip stack.exe
  -    @if %errorlevel% neq 0 (@echo FAILED: 7z x stack.zip stack.exe
  +    @if %errorlevel% neq 0 (@echo FAILED: couldn't extract stack from the distribution package
   	exit /b 1)
       del stack.zip
   
  
positive.code: mkdir      node_modules\daedalus-client-api
  
  pushd node_modules\daedalus-client-api
      powershell -Command "try { $wc = New-Object net.webclient; $wc.Downloadfile('https://ci.appveyor.com/api/projects/jagajaga/cardano-sl/artifacts/CardanoSL.zip?branch=%CARDANO_BRANCH%', 'CardanoSL.zip'); } catch { exit 1; }"
      @if %errorlevel% neq 0 (@echo FAILED: powershell -Command "try { $wc = New-Object net.webclient; $wc.Downloadfile('https://ci.appveyor.com/api/projects/jagajaga/cardano-sl/artifacts/CardanoSL.zip?branch=%CARDANO_BRANCH%', 'CardanoSL.zip'); } catch { exit 1; }"
  	popd & exit /b 1)
      @for /F "usebackq" %%A in ('CardanoSL.zip') do set size=%%~zA
      if %size% lss %MIN_CARDANO_BYTES% (@echo FAILED: CardanoSL.zip is too small: threshold=%MIN_CARDANO_BYTES%, actual=%size% bytes
  
negative.code: 
  set MIN_CARDANO_BYTES=50000000
  set LIBRESSL_VERSION=2.5.3
  set CURL_VERSION=7.54.0
  
  set DAEDALUS_VERSION=%1
  @if [%DAEDALUS_VERSION%]==[] (@echo FATAL: DAEDALUS_VERSION [argument #1] was not provided
  