diff --git a/Makefile b/Makefile
index c03782a..d45dd50 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ endif
 # Pytest options:
 # --resultlog: write test results in file
 # -s: do not capture stdout/stderr (some tests fail otherwise)
-PYTESTOPTS:=--resultlog=testresults.txt -s
+PYTESTOPTS:=--resultlog=testresults.txt -s --durations=0
 # which test modules to run
 TESTS ?= tests/
 # set test options
@@ -130,15 +130,14 @@ doc/$(LAPPNAME).txt: doc/$(LAPPNAME).1
 deb:
 # build a debian package
 	[ -f $(DEBORIGFILE) ] || cp dist/$(ARCHIVE_SOURCE) $(DEBORIGFILE) $(DEBUILDDIR)/$(LAPPNAME)_$(VERSION).orig.tar.gz
-	sed -i 's/VERSION:=.*/VERSION:=$(VERSION)/' $(DEBUILDDIR)/$(LAPPNAME).mak
+	sed -i -e 's/VERSION_$(LAPPNAME):=.*/VERSION_$(LAPPNAME):=$(VERSION)/' $(DEBUILDDIR)/$(LAPPNAME).mak
 	[ -d $(DEBPACKAGEDIR) ] || (cd $(DEBUILDDIR); \
 	  patool extract $(DEBORIGFILE); \
 	  cd $(CURDIR); \
 	  git checkout debian; \
 	  cp -r debian $(DEBPACKAGEDIR); \
 	  git checkout master)
-	rm -f $(DEBUILDDIR)/$(LAPPNAME)
-	$(MAKE) -C $(DEBUILDDIR) $(LAPPNAME)
+	$(MAKE) -C $(DEBUILDDIR) $(LAPPNAME)_clean $(LAPPNAME)
 
 update-copyright:
 # update-copyright is a local tool which updates the copyright year for each
diff --git a/setup.py b/setup.py
index efbdcd3..04ac493 100644
--- a/setup.py
+++ b/setup.py
@@ -205,13 +205,32 @@ class InnoScript:
 
     def sign (self):
         """Sign InnoSetup installer with local self-signed certificate."""
+        print("*** signing the inno setup installer ***")
         pfxfile = r'C:\patool.pfx'
         if os.path.isfile(pfxfile):
-            cmd = ['signtool.exe', 'sign', '/f', pfxfile, self.distfile]
-            subprocess.check_call(cmd)
+            path = get_windows_sdk_path()
+            signtool = os.path.join(path, "bin", "signtool.exe")
+            if os.path.isfile(signtool):
+                cmd = [signtool, 'sign', '/f', pfxfile, self.distfile]
+                subprocess.check_call(cmd)
+            else:
+                print("No signed installer: signtool.exe not found.")
         else:
             print("No signed installer: certificate %s not found." % pfxfile)
 
+def get_windows_sdk_path():
+    """Return path of Microsoft Windows SDK installation, or None if
+    not found."""
+    try:
+        import _winreg as winreg
+    except ImportError:
+        import winreg
+    sub_key = r"Software\Microsoft\Microsoft SDKs\Windows"
+    with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, sub_key) as key:
+        name = "CurrentInstallFolder"
+        return winreg.QueryValueEx(key, name)[0]
+    return None
+
 try:
     from py2exe.build_exe import py2exe as py2exe_build