diff --git a/package.yaml b/package.yaml
index f3c3ebb..9e0d828 100644
--- a/package.yaml
+++ b/package.yaml
@@ -6,6 +6,9 @@ ghc-options:
     - -Wall
     - -Werror
 
+    # For macOS: https://github.com/gibiansky/IHaskell/issues/942
+    - -optP-Wno-nonportable-include-path
+
 dependencies:
     - base
     - text
diff --git a/script/test b/script/test
index 710ac1d..1fc9656 100755
--- a/script/test
+++ b/script/test
@@ -3,6 +3,7 @@
 #!nix-shell -I nixpkgs=./nix
 #!nix-shell -p nix
 #!nix-shell --pure
+#!nix-shell --keep SSL_CERT_FILE
 
 set -euo pipefail