3 files changed, 34 insertions, 5 deletions
diff --git a/erts/etc/win32/nsis/Makefile b/erts/etc/win32/nsis/Makefile
index a53ac708f8..7bcecaa264 100644
--- a/erts/etc/win32/nsis/Makefile
+++ b/erts/etc/win32/nsis/Makefile
@@ -62,9 +62,15 @@ else
 endif
 
 REDIST_FILE=$(shell (sh ./find_redist.sh || echo ""))
+ifeq ($(MSYSTEM),MINGW32)
+	NICEREDISTFILE=$(shell (msys2win_path.sh -m "$(REDIST_FILE)" 2>/dev/null || echo ""))
+else
+	NICEREDISTFILE=$(shell (cygpath -d -m "$(REDIST_FILE)" 2>/dev/null || echo ""))
+endif
+
 REDIST_TARGET=$(shell (sh ./find_redist.sh -n || echo ""))
-REDIST_DLL_VERSION=$(shell (sh ./dll_version_helper.sh || echo ""))
-REDIST_DLL_NAME=$(shell (sh ./dll_version_helper.sh -n || echo ""))
+REDIST_DLL_VERSION=$(shell (sh ./dll_version_helper.sh $(NICEREDISTFILE) || echo ""))
+REDIST_DLL_NAME=$(shell (sh ./dll_version_helper.sh -n $(NICEREDISTFILE) || echo ""))
 
 release_spec:
 	@NSIS_VER=`makensis /hdrinfo | head -1 | awk '{print $$2}'`; \
diff --git a/erts/etc/win32/nsis/dll_version_helper.sh b/erts/etc/win32/nsis/dll_version_helper.sh
index 96e4532b7a..0d9ba4248d 100755
--- a/erts/etc/win32/nsis/dll_version_helper.sh
+++ b/erts/etc/win32/nsis/dll_version_helper.sh
@@ -25,6 +25,13 @@
 # echo "8.0.50727.763"
 # exit 0
 
+if [ "$1" = "-n" ]; then
+    SWITCH=$1
+    shift
+else
+    SWITCH=""
+fi
+
 cat > hello.c <<EOF
 #include <windows.h>
 #include <stdio.h>
@@ -42,11 +49,16 @@ if [ '!' -f hello.exe.manifest ]; then
     # need another way of getting the version
     DLLNAME=`dumpbin.exe -imports hello.exe | egrep MSVCR.*dll`
     DLLNAME=`echo $DLLNAME`
+    if [ '!' -z "$1" ]; then
+	FILETOLOOKIN=$1
+    else
+	FILETOLOOKIN=$DLLNAME
+    fi
     cat > helper.c <<EOF
 #include <windows.h>
 #include <stdio.h>
 
-#define REQ_MODULE "$DLLNAME"
+#define REQ_MODULE "$FILETOLOOKIN"
 
 int main(void)
 {
@@ -100,7 +112,7 @@ else
     NAME=`grep '<assemblyIdentity' hello.exe.manifest | sed 's,.*name=.[A-Za-z\.]*\([0-9]*\).*,msvcr\1.dll,g' | grep -v '<'`
 fi
 #rm -f hello.c hello.obj hello.exe hello.exe.manifest helper.c helper.obj helper.exe helper.exe.manifest
-if [ "$1" = "-n" ]; then
+if [ "$SWITCH" = "-n" ]; then
     ASKEDFOR=$NAME
 else
     ASKEDFOR=$VERSION
diff --git a/erts/etc/win32/nsis/erlang20.nsi b/erts/etc/win32/nsis/erlang20.nsi
index c5ada9e3b3..3333c4a9aa 100644
--- a/erts/etc/win32/nsis/erlang20.nsi
+++ b/erts/etc/win32/nsis/erlang20.nsi
@@ -35,6 +35,7 @@
 
 	!include "MUI.nsh"
 	!include "WordFunc.nsh"
+	!include "WinVer.nsh"
 ;--------------------------------
 ;Configuration
 
@@ -341,6 +342,9 @@ FunctionEnd
 Function .onInit
    Var /GLOBAL archprefix
    Var /GLOBAL sysnativedir
+   Var /GLOBAL winvermajor
+   Var /GLOBAL winverminor
+
    SectionGetFlags 0 $MYTEMP
    StrCmpS ${WINTYPE} "win64" +1 +4
 	StrCpy $archprefix "amd64"
@@ -348,9 +352,16 @@ Function .onInit
    Goto +3
 	StrCpy $archprefix "x86"
 	StrCpy $sysnativedir $SYSDIR
-   ;MessageBox MB_YESNO "Found $sysnativedir\${REDIST_DLL_NAME}" IDYES FoundLbl
+   ${WinVerGetMajor} $0
+   ${WinVerGetMinor} $1
+   StrCpy $winvermajor $0
+   StrCpy $winverminor $1
    IfFileExists $sysnativedir\${REDIST_DLL_NAME} MaybeFoundInSystemLbl
    SearchSxSLbl:	
+        IntCmp $winvermajor 6 WVCheckMinorLbl WVCheckDoneLbl NotFoundLbl
+   WVCheckMinorLbl:
+	IntCmp $winverminor 1 WVCheckDoneLbl WVCheckDoneLbl NotFoundLbl
+   WVCheckDoneLbl:
         FindFirst $0 $1 $WINDIR\WinSxS\$archprefix*
         LoopLbl:
 	    StrCmp $1 "" NotFoundLbl