"Project ERROR: msvc-version.conf loaded but QMAKE_MSC_VER isn't set" when building Qt with x86 MSVC2015

@echo off
cd C:\dev
set buildDir=C:\dev\qt5-dev-d-32
rmdir /s /q %buildDir%
mkdir %buildDir%
cd %buildDir%

REM temporary while debugging
set QMAKEFLAGS=-d

call C:\dev\qt5-dev\configure -debug -developer-build -opensource -confirm-license -nomake tests -nomake examples -opengl dynamic
call C:\dev\qt-unified\Tools\QtCreator\bin\jom.exe

Info: creating super cache file C:\dev\qt5-dev-d-32\.qmake.super
Project ERROR: msvc-version.conf loaded but QMAKE_MSC_VER isn't set
Error: File Makefile doesn't exist.

Entering 'qtbase'
commit 74197140be68fd7fe54c3a346a0e769928d7a3ea
Entering 'qtdeclarative'
commit 2b7a9aa1c78483f13576685f4e130c58258da94d
Entering 'qtgraphicaleffects'
commit c1c259ea76c4d8c94f6d96c3fd0bbbece25785bf
Entering 'qtquickcontrols'
commit 8b36cdd25761348c285305edec1bf861a924e858
Entering 'qtquickcontrols2'
commit 5ac7d0045c71b484d0aa817b8c3c5f4b89b9cf3e
Entering 'qtsvg'
commit 9c8d5d82b6c222f8dbbe60ec0b9382bb75b52f42
Entering 'qttools'
commit e9130dc1ff76d876e524b0f05c67716fd1609ef5
Entering 'qtvirtualkeyboard'
commit c3c2a9cdef6a402f756799f835f724b999e942a4
Entering 'qtxmlpatterns'
commit d26940d7769a35a517195079d7b402b0b6eb3c92