diff --git a/easybuild/easyblocks/f/flexiblas.py b/easybuild/easyblocks/f/flexiblas.py
index b3d5129385..feee155280 100644
--- a/easybuild/easyblocks/f/flexiblas.py
+++ b/easybuild/easyblocks/f/flexiblas.py
@@ -85,6 +85,9 @@ def __init__(self, *args, **kwargs):
 
         self.obj_builddir = os.path.join(self.builddir, 'easybuild_obj')
 
+        # custom CPATH to FlexiBLAS headers
+        self.module_load_environment.CPATH = [os.path.join('include', 'flexiblas')]
+
     def configure_step(self):
         """Custom configuration for FlexiBLAS, based on which BLAS libraries are included as dependencies."""
 
@@ -223,12 +226,3 @@ def sanity_check_step(self):
             custom_commands.append("flexiblas list | grep %s" % blas_lib.upper())
 
         super(EB_FlexiBLAS, self).sanity_check_step(custom_paths=custom_paths, custom_commands=custom_commands)
-
-    def make_module_req_guess(self):
-        """Customize CPATH for FlexiBLAS."""
-
-        guesses = super(EB_FlexiBLAS, self).make_module_req_guess()
-
-        guesses.update({'CPATH': [os.path.join('include', 'flexiblas')]})
-
-        return guesses
diff --git a/easybuild/easyblocks/generic/perlmodule.py b/easybuild/easyblocks/generic/perlmodule.py
index c3c537f299..7e5d168d76 100644
--- a/easybuild/easyblocks/generic/perlmodule.py
+++ b/easybuild/easyblocks/generic/perlmodule.py
@@ -139,14 +139,13 @@ def sanity_check_step(self, *args, **kwargs):
         """
         return ExtensionEasyBlock.sanity_check_step(self, EXTS_FILTER_PERL_MODULES, *args, **kwargs)
 
-    def make_module_req_guess(self):
-        """Customized dictionary of paths to look for with PERL*LIB."""
-        majver = get_major_perl_version()
+    def make_module_step(self, *args, **kwargs):
+        """
+        Custom paths to look for with PERL*LIB
+        """
+        perl_lib_var = f"PERL{get_major_perl_version()}LIB"
         sitearchsuffix = get_site_suffix('sitearch')
         sitelibsuffix = get_site_suffix('sitelib')
+        setattr(self.module_load_environment, perl_lib_var, ['', sitearchsuffix, sitelibsuffix])
 
-        guesses = super(PerlModule, self).make_module_req_guess()
-        guesses.update({
-            "PERL%sLIB" % majver: ['', sitearchsuffix, sitelibsuffix],
-        })
-        return guesses
+        return super().make_module_step(*args, **kwargs)
diff --git a/easybuild/easyblocks/p/perl.py b/easybuild/easyblocks/p/perl.py
index 159f755273..de9fe30153 100644
--- a/easybuild/easyblocks/p/perl.py
+++ b/easybuild/easyblocks/p/perl.py
@@ -198,7 +198,7 @@ def get_major_perl_version():
     Returns the major verson of the perl binary in the current path
     """
     cmd = "perl -MConfig -e 'print $Config::Config{PERL_API_REVISION}'"
-    res = run_shell_cmd(cmd)
+    res = run_shell_cmd(cmd, hidden=True)
     return res.output
 
 
@@ -212,7 +212,7 @@ def get_site_suffix(tag):
     """
     perl_cmd = 'my $a = $Config::Config{"%s"}; $a =~ s/($Config::Config{"siteprefix"})//; print $a' % tag
     cmd = "perl -MConfig -e '%s'" % perl_cmd
-    res = run_shell_cmd(cmd)
+    res = run_shell_cmd(cmd, hidden=True)
     sitesuffix = res.output
     # obtained value usually contains leading '/', so strip it off
     return sitesuffix.lstrip(os.path.sep)