sstate_hardcode_cmd = "%s | xargs %s | %s | xargs %s %s" % (sstate_scan_cmd, sstate_grep_cmd, sstate_filelist_cmd, xargs_no_empty_run_cmd, sstate_sed_cmd)
 
     bb.note("Removing hardcoded paths from sstate package: '%s'" % (sstate_hardcode_cmd))
-    subprocess.check_call(sstate_hardcode_cmd, shell=True, cwd=sstate_builddir)
+    subprocess.check_output(sstate_hardcode_cmd, shell=True, cwd=sstate_builddir)
 
         # If the fixmefn is empty, remove it..
     if os.stat(fixmefn).st_size == 0:
         os.remove(fixmefn)
     else:
         bb.note("Replacing absolute paths in fixmepath file: '%s'" % (sstate_filelist_relative_cmd))
-        subprocess.check_call(sstate_filelist_relative_cmd, shell=True)
+        subprocess.check_output(sstate_filelist_relative_cmd, shell=True)
 }
 
 def sstate_package(ss, d):
 
         fixme_path = d.getVar(fixmevar)
         cmd += " -e 's:FIXME_%s:%s:g'" % (fixmevar, fixme_path)
     bb.note(cmd)
-    subprocess.check_call(cmd, shell=True)
+    subprocess.check_output(cmd, shell=True)
 
 
 def staging_populate_sysroot_dir(targetsysroot, nativesysroot, native, d):
 
     staging_processfixme(fixme, targetdir, targetsysroot, nativesysroot, d)
     for p in postinsts:
-        subprocess.check_call(p, shell=True)
+        subprocess.check_output(p, shell=True)
 
 #
 # Manifests here are complicated. The main sysroot area has the unpacked sstate
             staging_processfixme(fixme[f], multilibs[f].getVar("RECIPE_SYSROOT"), recipesysroot, recipesysrootnative, d)
 
     for p in postinsts:
-        subprocess.check_call(p, shell=True)
+        subprocess.check_output(p, shell=True)
 
     for dep in configuredeps:
         c = setscenedeps[dep][0]
 
                     os.symlink(localpath, tarballpath)
 
         cmd = d.expand("mkdir -p ${UNINATIVE_STAGING_DIR}-uninative; cd ${UNINATIVE_STAGING_DIR}-uninative; tar -xjf ${UNINATIVE_DLDIR}/%s/${UNINATIVE_TARBALL}; ${UNINATIVE_STAGING_DIR}-uninative/relocate_sdk.py ${UNINATIVE_STAGING_DIR}-uninative/${BUILD_ARCH}-linux ${UNINATIVE_LOADER} ${UNINATIVE_LOADER} ${UNINATIVE_STAGING_DIR}-uninative/${BUILD_ARCH}-linux/${bindir_native}/patchelf-uninative ${UNINATIVE_STAGING_DIR}-uninative/${BUILD_ARCH}-linux${base_libdir_native}/libc*.so" % chksum)
-        subprocess.check_call(cmd, shell=True)
+        subprocess.check_output(cmd, shell=True)
 
         with open(loaderchksum, "w") as f:
             f.write(chksum)
 
             bb.note("> Executing %s intercept ..." % script)
 
             try:
-                subprocess.check_call(script_full)
+                subprocess.check_output(script_full)
             except subprocess.CalledProcessError as e:
-                bb.warn("The postinstall intercept hook '%s' failed (exit code: %d)! See log for details!" %
-                        (script, e.returncode))
+                bb.warn("The postinstall intercept hook '%s' failed (exit code: %d)! See log for details! (Output: %s)" %
+                        (script, e.returncode, e.output))
 
                 with open(script_full) as intercept:
                     registered_pkgs = None
 
         self._download_archive()
 
         cmd = 'tar xf %s%s -C %s' % (self.targetdir, self.archive, self.targetdir)
-        subprocess.check_call(cmd, shell=True)
+        subprocess.check_output(cmd, shell=True)
 
         #Change targetdir to project folder
         self.targetdir = os.path.join(self.targetdir, self.fname)
 
             return
 
         cmd = "wget -O %s %s" % (self.localarchive, self.uri)
-        subprocess.check_call(cmd, shell=True)
+        subprocess.check_output(cmd, shell=True)
 
     # This method should provide a way to run a command in the desired environment.
     @abstractmethod
 
                 cmd = 'export ' + var + '=\"%s\"; %s' % (val, cmd)
 
         cmd = cmd + "wget -O %s %s" % (self.localarchive, self.uri)
-        subprocess.check_call(cmd, shell=True)
+        subprocess.check_output(cmd, shell=True)
 
     # This method should provide a way to run a command in the desired environment.
     @abstractmethod
         self._download_archive()
 
         cmd = 'tar xf %s%s -C %s' % (self.targetdir, self.archive, self.targetdir)
-        subprocess.check_call(cmd, shell=True)
+        subprocess.check_output(cmd, shell=True)
 
         #Change targetdir to project folder
         self.targetdir = os.path.join(self.targetdir, self.fname)