diff --git a/libs/ardour/wscript b/libs/ardour/wscript
index 3da991be71..7376bec868 100644
--- a/libs/ardour/wscript
+++ b/libs/ardour/wscript
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 from waflib.extras import autowaf as autowaf
-from waflib import Options
+from waflib import Options, Task, Tools
 import os
 import sys
 import re
@@ -373,6 +373,11 @@ def build(bld):
     # micro increment <=> no interface changes
     LIBARDOUR_LIB_VERSION = "3.0.0"
 
+    # remove '${DEFINES_ST:DEFINES}' from run_str.
+    # x86_64-w64-mingw32-as (mingw) -D flag is for debug messages
+    if bld.env['build_target'] == 'mingw':
+        class asm(Task.classes['asm']): run_str = '${AS} ${ASFLAGS} ${ASMPATH_ST:INCPATHS} ${AS_SRC_F}${SRC} ${AS_TGT_F}${TGT}'
+
     # operate on copy to avoid adding sources twice
     sources = list(libardour_sources)
 
diff --git a/tools/osx_packaging/osx_build b/tools/osx_packaging/osx_build
index f890cfe971..df6a2864a7 100755
--- a/tools/osx_packaging/osx_build
+++ b/tools/osx_packaging/osx_build
@@ -472,7 +472,7 @@ while [ true ] ; do
 			strip -u -r -arch all $file &>/dev/null
 		fi
 
-		deps=`otool -L $file | awk '{print $1}' | egrep "($GTKSTACK_ROOT|$ARDOURSTACK_ROOT|/opt/|/local/|libs/$STDCPP)" | grep -v 'libjack\.' | grep -v "$(basename $file)"`
+		deps=`otool -L $file | awk '{print $1}' | egrep "($GTKSTACK_ROOT|$ARDOURSTACK_ROOT|/opt/|/local/|libs/$STDCPP)" | grep -v 'libjack\.' | egrep -v "$(basename $file .dylib).*.dylib"`
 		# echo -n "."
 		for dep in $deps ; do
 			base=`basename $dep`
diff --git a/tools/x-win/compile.sh b/tools/x-win/compile.sh
index 6f8e141685..00fe2737e2 100755
--- a/tools/x-win/compile.sh
+++ b/tools/x-win/compile.sh
@@ -81,7 +81,8 @@ DEPSTACK_ROOT="$PREFIX" \
 	--dist-target=mingw \
 	--also-include=${PREFIX}/include \
 	$ARDOURCFG \
-	--prefix=${PREFIX}
+	--prefix=${PREFIX} \
+	--libdir=${PREFIX}/lib
 
 ./waf ${CONCURRENCY}
 
diff --git a/tools/x-win/package.sh b/tools/x-win/package.sh
index 3dbfa6c248..dfbea0978a 100755
--- a/tools/x-win/package.sh
+++ b/tools/x-win/package.sh
@@ -202,6 +202,7 @@ cp gtk2_ardour/icons/cursor_square/* $DESTDIR/share/${LOWERCASE_DIRNAME}/icons/
 # clean build-dir after depoyment
 echo " === bundle completed, cleaning up"
 ./waf uninstall
+find $DESTDIR -name "*.dll.a" | xargs rm
 echo " === complete"
 du -sh $DESTDIR
 
diff --git a/wscript b/wscript
index e1beb6a86d..b0d60e59bb 100644
--- a/wscript
+++ b/wscript
@@ -943,6 +943,12 @@ def configure(conf):
         conf.env.append_value ('CXXFLAGS', '-DSILENCE_AFTER')
         conf.define ('FREEBIE', 1)
 
+    # set explicit LIBDIR, otherwise mingw/windows builds use
+    # conf.env.LIBDIR = conf.env.BINDIR and `waf install` fails
+    # because $BINDIR/ardour6 is the main binary, and $LIBDIR/ardour6/ a directory
+    if Options.options.libdir:
+        conf.env.LIBDIR = Options.options.libdir
+
     if Options.options.lv2dir:
         conf.env['LV2DIR'] = Options.options.lv2dir
     else:
@@ -1299,6 +1305,17 @@ int main () { return 0; }
     # Fix utterly braindead FLAC include path to not smash assert.h
     conf.env['INCLUDES_FLAC'] = []
 
+    if sys.platform == 'darwin':
+        # override waf's -install_name added in
+        # waflib/Tools/ccroot.py when -dynamiclib is used
+        if conf.env.LINKFLAGS_cshlib:
+            conf.env.LINKFLAGS_cshlib = [];
+            conf.env.LDFLAGS_cshlib = ['-dynamiclib']
+
+        if conf.env.LINKFLAGS_cxxshlib:
+            conf.env.LINKFLAGS_cxxshlib = [];
+            conf.env.LDFLAGS_cxxshlib = ['-dynamiclib']
+
     config_text = open('libs/ardour/config_text.cc', "w")
     config_text.write('''#include "ardour/ardour.h"
 namespace ARDOUR {