diff --git a/Compiler/libint-lmax6/build b/Compiler/libint-lmax6/build
new file mode 100755
index 0000000..fb632ea
--- /dev/null
+++ b/Compiler/libint-lmax6/build
@@ -0,0 +1,27 @@
+#!/usr/bin/env modbuild
+
+pbuild::set_download_url "https://github.com/cp2k/libint-cp2k/releases/download/v${V_PKG}/libint-v${V_PKG}-cp2k-lmax-6.tgz"
+pbuild::add_to_group 'Compiler'
+
+#pbuild::install_docfiles 'CONTRIBUTING.md'
+#pbuild::install_docfiles 'LICENSE.md'
+#pbuild::install_docfiles 'README.md'
+
+pbuild::compile_in_sourcetree
+
+pbuild::post_prep() {
+	sed -i 's/(CXX)/(FC)/g' fortran/Makefile.in
+}
+
+pbuild::pre_configure() {
+	local -a cxxflags=()
+	cxxflags+=('-O2' '-fPIC' '-g1')
+	cxxflags+=('-fp-model precise' '-funroll-loops')
+	cxxflags+=('-traceback' '-xHost')
+
+	pbuild::add_configure_args "--with-cxx=${CXX}"
+	pbuild::add_configure_args "--with-cxx-optflags=${cxxflags[*]}"
+	pbuild::add_configure_args "--with-fc=ifort"
+	pbuild::add_configure_args "--enable-fortran"
+}
+
diff --git a/Compiler/libint-lmax6/files/variants.rhel6 b/Compiler/libint-lmax6/files/variants.rhel6
new file mode 100644
index 0000000..c8946d2
--- /dev/null
+++ b/Compiler/libint-lmax6/files/variants.rhel6
@@ -0,0 +1 @@
+libint-lmax6/2.6.0	unstable	intel/19.4 b:Python/3.7.4
diff --git a/Compiler/libint-lmax6/modulefile b/Compiler/libint-lmax6/modulefile
new file mode 100644
index 0000000..7250d87
--- /dev/null
+++ b/Compiler/libint-lmax6/modulefile
@@ -0,0 +1,11 @@
+#%Module1.0
+
+module-whatis		"evaluation of molecular integrals of many-body operators over Gaussian functions"
+module-url		"https://github.com/evaleev/libint"
+module-license		"GNU LGPL, version 3; GNU GPL, version 3"
+module-maintainer	"Achim Gsell <achim.gsell@psi.ch>"
+module-help		"
+A library for the evaluation of molecular integrals of many-body
+operators over Gaussian functions.
+"
+