diff --git a/src/fortran/CMakeLists.txt b/src/fortran/CMakeLists.txt
index cb298b5f..38d53861 100644
--- a/src/fortran/CMakeLists.txt
+++ b/src/fortran/CMakeLists.txt
@@ -1,5 +1,16 @@
 target_sources(strumpack
   PRIVATE ${CMAKE_CURRENT_LIST_DIR}/strumpack.f90)
 
-install(DIRECTORY ${CMAKE_BINARY_DIR}/
-  DESTINATION include FILES_MATCHING PATTERN *.mod)
+# This is really a problem. Using a wildcard to install the mod makes
+# CMake install a bunch of empty directories, which leads to an
+# infinite recursion when building in the src tree, which we do for
+# testing.
+# install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+#   DESTINATION include FILES #_MATCHING PATTERN
+#   strumpack.mod STRUMPACK.mod STRUMPACK.MOD)
+
+install(FILES
+  ${CMAKE_BINARY_DIR}/strumpack.mod
+  ${CMAKE_BINARY_DIR}/STRUMPACK.mod
+  ${CMAKE_BINARY_DIR}/STRUMPACK.MOD
+  DESTINATION include OPTIONAL)
diff --git a/src/structured/fortran/CMakeLists.txt b/src/structured/fortran/CMakeLists.txt
index 41b80869..16e1c3ab 100644
--- a/src/structured/fortran/CMakeLists.txt
+++ b/src/structured/fortran/CMakeLists.txt
@@ -1,5 +1,16 @@
 target_sources(strumpack
   PRIVATE ${CMAKE_CURRENT_LIST_DIR}/strumpack_dense.f90)
 
-install(DIRECTORY ${CMAKE_BINARY_DIR}/
-  DESTINATION include FILES_MATCHING PATTERN *.mod)
+# This is really a problem. Using a wildcard to install the mod makes
+# CMake install a bunch of empty directories, which leads to an
+# infinite recursion when building in the src tree, which we do for
+# testing.
+# install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+#   DESTINATION include FILES #_MATCHING PATTERN
+#   strumpack_dense.mod STRUMPACK_DENSE.mod STRUMPACK_DENSE.MOD)
+
+install(FILES
+  ${CMAKE_BINARY_DIR}/strumpack_dense.mod
+  ${CMAKE_BINARY_DIR}/STRUMPACK_DENSE.mod
+  ${CMAKE_BINARY_DIR}/STRUMPACK_DENSE.MOD
+  DESTINATION include OPTIONAL)