diff --git a/src/msspec/spec/fortran/SConstruct b/src/msspec/spec/fortran/SConstruct
index 5791198..53ba2c0 100644
--- a/src/msspec/spec/fortran/SConstruct
+++ b/src/msspec/spec/fortran/SConstruct
@@ -1,7 +1,6 @@
 from sysconfig import get_config_var
 import os
 
-SetOption('silent', True)
 # Define the command line options
 AddOption('--dbg',
           dest='dbg',
@@ -13,29 +12,57 @@ AddOption('--verbose',
           action='store_true',
           help='add debugging symbols')
 
+AddOption('--compiler',
+		      dest='compiler',
+					default='gfortran',
+					choices=['gfortran', 'ifort'],
+					help='The Fortran compiler to use')
+
+def CheckPKGConfig(context, version):
+     context.Message( 'Checking for pkg-config... ' )
+     ret = context.TryAction('pkg-config --atleast-pkgconfig-version=%s' % version)[0]
+     context.Result( ret )
+     return ret
+
+def CheckPKG(context, name):
+     context.Message( 'Checking for %s... ' % name )
+     ret = context.TryAction('pkg-config --exists \'%s\'' % name)[0]
+     context.Result( ret )
+     return ret
+
+
+
 
 # define environments
-COMP_OPTS = ['-O2', '-ffast-math', '-fno-automatic']
-#std = Environment(tools=['default', 'gfortran'], FORTRAN='gfortran', 
-std = Environment(FORTRAN='gfortran', 
-		              FORTRANFLAGS=['-fPIC', '-O2', '-ffast-math', '-fno-automatic'],
-		              F2PY_OPTS=[],
-									FORTRANCOMSTR = "building $TARGET ...")
+std = Environment(tools=['default', 'fortran'], F2PY_OPTS=[], FORTRANCOMSTR = "building $TARGET ...")
 
-dbg = std.Clone()
-dbg.Append(FORTRANFLAGS = ['-g', '-Wall', '-Wextra', '-Warray-temporaries', '-Wconversion', '-fbacktrace', 
-					                 '-ffree-line-length-0', '-fcheck=all', '-ffpe-trap=zero,overflow,underflow',
-												   '-finit-real=nan'])
-dbg.Append(F2PY_OPTS = ['--debug-capi', '--debug'])
+gfortran_env = std.Clone(tools=['gfortran'])
+gfortran_env.Replace(FORTRANFLAGS=['-fPIC', '-O2', '-ffast-math', '-fno-automatic'])
+
+ifort_env = std.Clone(tools=['ifort'])
+
+# parse options
+if GetOption('compiler') == 'gfortran':
+	env = gfortran_env
+elif GetOption('compiler') == 'ifort':
+	env = ifort_env
 
-env = std
 if GetOption('dbg'):
-	env = dbg
+	gfortran_env.Append(FORTRANFLAGS = ['-g', '-Wall', '-Wextra', '-Warray-temporaries', '-Wconversion', '-fbacktrace', 
+					                 '-ffree-line-length-0', '-fcheck=all', '-ffpe-trap=zero,overflow,underflow',
+												   '-finit-real=nan'],
+						          F2PY_OPTS = ['--debug-capi', '--debug'])
 
 if GetOption('verbose'):
-	SetOption('silent', False)
-	#env.Replace(FORTRANCOMSTR = "")
+  env.Replace(FORTRANCOMSTR = "")
 
+# Configuration:
+conf = Configure(env, custom_tests = { 'CheckPKG' : CheckPKG})
+
+if conf.CheckPKG('lapack'):
+	env.ParseConfig("pkg-config lapack --libs")
+
+conf.Finish()
 
 
 suffix = get_config_var('EXT_SUFFIX')
@@ -52,6 +79,11 @@ sources = {
   'eig_mi_src'                : Glob('eig/mi/*.f'),
   'eig_pw_src'                : Glob('eig/pw/*.f')}
 
+if 'lapack' in env['LIBS']:
+	env.Append(F2PY_OPTS = "-llapack")
+	for k,files in sources.items():
+		sources[k] = [_ for _ in files if str(_).find('lapack') == -1]
+
 objects = {}
 for k, v in sources.items():
 	objects[k.replace('_src', '_obj')] = env.Object(v)
@@ -69,8 +101,11 @@ modules = {}
 
 for k, v in shared_objects.items():
 	cmd = "f2py3 -I. " + " ".join([str(_) for _ in objects if str(_).endswith('.o')]) + f"$F2PY_OPTS -c -m {k} $SOURCE"
-	cmd += " 1>/dev/null"
-	modules[k + suffix] = env.Command(k + suffix, v, Action(cmd, 'Building Python module $TARGET'))
+	cmd += "2>/dev/null 1>/dev/null"
+	modules[k + suffix] = env.Command(k + suffix, v, Action(cmd, '$FORTRANCOMSTR'))
 	Requires(modules[k + suffix], objects.values())
 
+#for k,v in env.items():
+#	print(k,v)
 
+#exit()