diff -Naur old/SConstruct new/SConstruct
--- old/SConstruct	2021-03-21 01:18:43.000000000 +0300
+++ new/SConstruct	2021-03-21 01:27:06.000000000 +0300
@@ -193,7 +193,7 @@
     toolchain = ['default']
 
 env = Environment(tools=toolchain+['textfile', 'subst', 'recursiveInstall', 'wix', 'gch'],
-                  ENV={'PATH': os.environ['PATH']},
+                  ENV={'PATH': os.environ['PATH'], 'CCACHE_DIR': os.environ.get('CCACHE_DIR','')},
                   toolchain=toolchain,
                   **extraEnvArgs)
 
@@ -239,6 +239,9 @@
     sys.exit(1)
 
 compiler_options = [
+     ('AR',
+     """The archiver to use.""",
+     env['AR']),
     ('CXX',
      """The C++ compiler to use.""",
      env['CXX']),
@@ -734,10 +734,7 @@
 env['cantera_pure_version'] = re.match(r'(\d+\.\d+\.\d+)', env['cantera_version']).group(0)
 env['cantera_short_version'] = re.match(r'(\d+\.\d+)', env['cantera_version']).group(0)
 
-try:
-    env['git_commit'] = getCommandOutput('git', 'rev-parse', '--short', 'HEAD')
-except Exception:
-    env['git_commit'] = 'unknown'
+env['git_commit'] = 'unknown'
 
 # Print values of all build options:
 print("Configuration variables read from 'cantera.conf' and command line:")
@@ -1149,10 +1149,24 @@
         if retcode == 0:
             config_error("Failed to determine Sundials BLAS/LAPACK.")
         env['has_sundials_lapack'] = int(has_sundials_lapack.strip())
-    else:
-        # In Sundials 2.6, SUNDIALS_BLAS_LAPACK is either defined or undefined
+    elif sundials_ver < parse_version('5.5'):
+        # In Sundials 2.6-5.5, SUNDIALS_BLAS_LAPACK is either defined or undefined
         env['has_sundials_lapack'] = conf.CheckDeclaration('SUNDIALS_BLAS_LAPACK',
                 '#include "sundials/sundials_config.h"', 'C++')
+    else:
+        # In Sundials 5.5 and higher, two defines are included specific to the
+        # SUNLINSOL packages indicating whether SUNDIALS has been built with LAPACK
+        lapackband = conf.CheckDeclaration(
+            "SUNDIALS_SUNLINSOL_LAPACKBAND",
+            '#include "sundials/sundials_config.h"',
+            "C++",
+        )
+        lapackdense = conf.CheckDeclaration(
+            "SUNDIALS_SUNLINSOL_LAPACKDENSE",
+            '#include "sundials/sundials_config.h"',
+            "C++",
+        )
+        env["has_sundials_lapack"] = lapackband and lapackdense
 
     # In the case where a user is trying to link Cantera to an external BLAS/LAPACK
     # library, but Sundials was configured without this support, print a Warning.
diff -Naur old/interfaces/cython/SConscript new/interfaces/cython/SConscript
--- old/interfaces/cython/SConscript	2021-03-21 01:18:43.000000000 +0300
+++ new/interfaces/cython/SConscript	2021-03-21 01:59:29.000000000 +0300
@@ -108,8 +108,7 @@
     elif localenv['libdirname'] != 'lib':
         # 64-bit RHEL / Fedora etc. or e.g. x32 Gentoo profile
         extra = localenv.subst(
-            ' --prefix=${{python_prefix}}'
-            ' --install-lib=${{python_prefix}}/${{libdirname}}/python{}/site-packages'.format(py_version))
+            ' --prefix=${stage_dir}${prefix} --install-lib=${python_prefix}')
     else:
         extra = '--user'
         localenv.AppendENVPath(
diff -Naur old/interfaces/python_minimal/SConscript new/interfaces/python_minimal/SConscript
--- old/interfaces/python_minimal/SConscript	2021-02-13 00:57:15.000000000 +0300
+++ new/interfaces/python_minimal/SConscript	2021-04-09 23:26:28.000000000 +0300
@@ -8,7 +8,7 @@
 make_setup = build(localenv.SubstFile('setup.py', 'setup.py.in'))
 
 # copy scripts from the full Cython module
-for script in ['ctml_writer', 'ck2cti']:
+for script in ['ctml_writer', 'ck2cti', 'ck2yaml', 'cti2yaml', 'ctml2yaml']:
     # The actual script
     s = build(env.Command('cantera/{}.py'.format(script),
                           '#interfaces/cython/cantera/{}.py'.format(script),
@@ -38,8 +38,7 @@
         elif localenv['libdirname'] != 'lib':
             # 64-bit RHEL / Fedora etc. or e.g. x32 Gentoo profile
             extra = localenv.subst(
-                ' --prefix=${{python_prefix}}'
-                ' --install-lib=${{python_prefix}}/${{libdirname}}/python{}/site-packages'.format(py_version))
+                ' --prefix=${stage_dir}${prefix} --install-lib=${python_prefix}')
         else:
             extra = '--user'
             localenv.AppendENVPath(
diff -Naur old/interfaces/python_minimal/cantera/__init__.py new/interfaces/python_minimal/cantera/__init__.py
--- old/interfaces/python_minimal/cantera/__init__.py	2021-02-13 00:57:15.000000000 +0300
+++ new/interfaces/python_minimal/cantera/__init__.py	2021-04-10 00:07:38.000000000 +0300
@@ -1,2 +1,5 @@
 from . import ck2cti
 from . import ctml_writer
+from . import ck2yaml
+from . import cti2yaml
+from . import ctml2yaml
diff -Naur old/interfaces/python_minimal/setup.py.in new/interfaces/python_minimal/setup.py.in
--- old/interfaces/python_minimal/setup.py.in	2021-02-13 00:57:15.000000000 +0300
+++ new/interfaces/python_minimal/setup.py.in	2021-04-09 23:32:09.000000000 +0300
@@ -12,6 +12,9 @@
         'console_scripts': [
             'ck2cti=cantera.ck2cti:script_entry_point',
             'ctml_writer=cantera.ctml_writer:main',
+            'ck2yaml=cantera.ck2yaml:script_entry_point',
+            'cti2yaml=cantera.cti2yaml:main',
+            'ctml2yaml=cantera.ctml2yaml:main',
         ],
       },
 )
diff -Naur old/test_problems/SConscript new/test_problems/SConscript
--- old/test_problems/SConscript	2021-03-21 01:18:43.000000000 +0300
+++ new/test_problems/SConscript	2021-03-21 01:42:19.000000000 +0300
@@ -222,7 +222,7 @@
 CompileAndTest('VPsilane_test')
 
 CompileAndTest('clib', 'clib_test', 'clib_test',
-               extensions=['^clib_test.c'], libs=['cantera_shared'])
+               extensions=['^clib_test.c'])
 
 # C++ Samples
 Test('cxx-bvp', 'cxx_samples', '#build/samples/cxx/bvp/blasius', None,