diff --git a/README.md b/README.md
index 9121fe5..e18f659 100644
--- a/README.md
+++ b/README.md
@@ -19,11 +19,13 @@ _Compiling_
 
   1. Export environment variables for PETSc and SLEPc
 
-```shell
-export PETSC_DIR=${PATH_TO_PETSC_INSTALLATION}
-export SLEPC_DIR=${PATH_TO_SLEPC_INSTALLATION}
-export C_INCLUDE_PATH+=:$PETSC_DIR/include/:$SLEPC_DIR/include:$PETSC_DIR/arch-linux2-c-debug/include/:$SLEPC_DIR/arch-linux2-c-debug/include
-```
+	```shell
+	export PETSC_DIR=${PATH_TO_PETSC_INSTALLATION}
+	export SLEPC_DIR=${PATH_TO_SLEPC_INSTALLATION}
+	export C_INCLUDE_PATH+=:$PETSC_DIR/include/:$SLEPC_DIR/include:$PETSC_DIR/arch-linux2-c-debug/include/:$SLEPC_DIR/arch-linux2-c-debug/include
+	# The "arch-linux2-c-debug" directory can have different names depending on PETSC and SLEPC installation procedure.
+	```
+
 
   2. Make the executable