diff --git a/index/gn/gnat_native/gnat_native-14.1.3.toml b/index/gn/gnat_native/gnat_native-14.1.3.toml
index 1d2851b7..5dd68368 100644
--- a/index/gn/gnat_native/gnat_native-14.1.3.toml
+++ b/index/gn/gnat_native/gnat_native-14.1.3.toml
@@ -12,8 +12,23 @@ auto-gpr-with = false
 [configuration]
 disabled = true
 
-[environment]
+[environment."case(os)".linux."case(host-arch)".x86-64]
 PATH.prepend = "${CRATE_ROOT}/bin"
+LIBRARY_PATH.prepend = "${CRATE_ROOT}/lib64"
+LD_LIBRARY_PATH.prepend = "${CRATE_ROOT}/lib64"
+LD_RUN_PATH.prepend = "${CRATE_ROOT}/lib64"
+
+[environment."case(os)".windows."case(host-arch)".x86-64]
+PATH.prepend = "${CRATE_ROOT}/bin"
+LIBRARY_PATH.prepend = "${CRATE_ROOT}/lib"
+LD_LIBRARY_PATH.prepend = "${CRATE_ROOT}/lib"
+LD_RUN_PATH.prepend = "${CRATE_ROOT}/lib"
+
+[environment."case(os)".macos."case(host-arch)".x86-64]
+PATH.prepend = "${CRATE_ROOT}/bin"
+LIBRARY_PATH.prepend = "${CRATE_ROOT}/lib"
+LD_LIBRARY_PATH.prepend = "${CRATE_ROOT}/lib"
+LD_RUN_PATH.prepend = "${CRATE_ROOT}/lib"
 
 [origin."case(os)".linux."case(host-arch)".x86-64]
 binary = true