diff --git a/meta/uninstalled-env.in b/meta/uninstalled-env.in
index 58d50ca1b..3c9515367 100644
--- a/meta/uninstalled-env.in
+++ b/meta/uninstalled-env.in
@@ -85,12 +85,14 @@ fi
 export GUILE_LOAD_COMPILED_PATH
 
 # Don't look in installed dirs for guile modules
-if ( env | grep -v -q -E '^GUILE_SYSTEM_COMPILED_PATH=' ); then
-  export GUILE_SYSTEM_COMPILED_PATH=
+if ( env | grep -v '^GUILE_SYSTEM_COMPILED_PATH=' > /dev/null ); then
+  GUILE_SYSTEM_COMPILED_PATH=
+  export GUILE_SYSTEM_COMPILED_PATH
 fi
 # Don't look in installed dirs for dlopen-able modules
-if ( env | grep -v -q -E '^GUILE_SYSTEM_EXTENSIONS_PATH=' ); then
-  export GUILE_SYSTEM_EXTENSIONS_PATH=
+if ( env | grep -v '^GUILE_SYSTEM_EXTENSIONS_PATH=' > /dev/null ); then
+  GUILE_SYSTEM_EXTENSIONS_PATH=
+  export GUILE_SYSTEM_EXTENSIONS_PATH
 fi
 
 # handle LTDL_LIBRARY_PATH (no clobber)