diff --git a/easybuild/easyconfigs/l/LERC/LERC-3.0-GCCcore-10.2.0.eb b/easybuild/easyconfigs/l/LERC/LERC-3.0-GCCcore-10.2.0.eb
index d97e184c8e4..a75e046b3d0 100644
--- a/easybuild/easyconfigs/l/LERC/LERC-3.0-GCCcore-10.2.0.eb
+++ b/easybuild/easyconfigs/l/LERC/LERC-3.0-GCCcore-10.2.0.eb
@@ -29,7 +29,7 @@ postinstallcmds = [
     "cd %(builddir)s/lerc-%(version)s/src/LercTest && sed -i -e 's@../LercLib/include/@@' main.cpp",
     "mkdir %(installdir)s/LercTest",
     "cp %(builddir)s/lerc-%(version)s/src/LercTest/main.cpp %(installdir)s/LercTest/main.cpp",
-    "cd %(installdir)s/LercTest && g++ main.cpp -o LercTest -I../include -L../lib -lLerc",
+    "cd %(installdir)s/LercTest && ${CXX} ${CXXFLAGS} main.cpp -o LercTest -I../include -L../lib -lLerc",
 ]
 
 sanity_check_commands = [
diff --git a/easybuild/easyconfigs/l/LERC/LERC-3.0-GCCcore-10.3.0.eb b/easybuild/easyconfigs/l/LERC/LERC-3.0-GCCcore-10.3.0.eb
index d840c118937..244ff0d0dde 100644
--- a/easybuild/easyconfigs/l/LERC/LERC-3.0-GCCcore-10.3.0.eb
+++ b/easybuild/easyconfigs/l/LERC/LERC-3.0-GCCcore-10.3.0.eb
@@ -30,7 +30,7 @@ postinstallcmds = [
     "cd %(builddir)s/lerc-%(version)s/src/LercTest && sed -i -e 's@../LercLib/include/@@' main.cpp",
     "mkdir %(installdir)s/LercTest",
     "cp %(builddir)s/lerc-%(version)s/src/LercTest/main.cpp %(installdir)s/LercTest/main.cpp",
-    "cd %(installdir)s/LercTest && g++ main.cpp -o LercTest -I../include -L../lib -lLerc",
+    "cd %(installdir)s/LercTest && ${CXX} ${CXXFLAGS} main.cpp -o LercTest -I../include -L../lib -lLerc",
 ]
 
 sanity_check_commands = [
diff --git a/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-11.3.0.eb b/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-11.3.0.eb
index 0d75f8951b5..0e4b8e45445 100644
--- a/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-11.3.0.eb
+++ b/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-11.3.0.eb
@@ -30,7 +30,7 @@ postinstallcmds = [
     "cd %(builddir)s/lerc-%(version)s/src/LercTest && sed -i -e 's@../LercLib/include/@@' main.cpp",
     "mkdir %(installdir)s/LercTest",
     "cp %(builddir)s/lerc-%(version)s/src/LercTest/main.cpp %(installdir)s/LercTest/main.cpp",
-    "cd %(installdir)s/LercTest && g++ main.cpp -o LercTest -I../include -L../lib -lLerc",
+    "cd %(installdir)s/LercTest && ${CXX} ${CXXFLAGS} main.cpp -o LercTest -I../include -L../lib -lLerc",
 ]
 
 sanity_check_commands = [
diff --git a/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-12.2.0.eb b/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-12.2.0.eb
index 6ab247c4dc5..195f472bdb3 100644
--- a/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-12.2.0.eb
+++ b/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-12.2.0.eb
@@ -30,7 +30,7 @@ postinstallcmds = [
     "cd %(builddir)s/lerc-%(version)s/src/LercTest && sed -i -e 's@../LercLib/include/@@' main.cpp",
     "mkdir %(installdir)s/LercTest",
     "cp %(builddir)s/lerc-%(version)s/src/LercTest/main.cpp %(installdir)s/LercTest/main.cpp",
-    "cd %(installdir)s/LercTest && g++ main.cpp -o LercTest -I../include -L../lib -lLerc",
+    "cd %(installdir)s/LercTest && ${CXX} ${CXXFLAGS} main.cpp -o LercTest -I../include -L../lib -lLerc",
 ]
 
 sanity_check_commands = [
diff --git a/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-12.3.0.eb b/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-12.3.0.eb
index 72119ad4c33..20a4a92f02a 100644
--- a/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-12.3.0.eb
+++ b/easybuild/easyconfigs/l/LERC/LERC-4.0.0-GCCcore-12.3.0.eb
@@ -30,7 +30,7 @@ postinstallcmds = [
     "cd %(builddir)s/lerc-%(version)s/src/LercTest && sed -i -e 's@../LercLib/include/@@' main.cpp",
     "mkdir %(installdir)s/LercTest",
     "cp %(builddir)s/lerc-%(version)s/src/LercTest/main.cpp %(installdir)s/LercTest/main.cpp",
-    "cd %(installdir)s/LercTest && g++ main.cpp -o LercTest -I../include -L../lib -lLerc",
+    "cd %(installdir)s/LercTest && ${CXX} ${CXXFLAGS} main.cpp -o LercTest -I../include -L../lib -lLerc",
 ]
 
 sanity_check_commands = [