Provide a builtin default for $NIX_SSL_CERT_FILE

This is mostly to ensure that when Nix is started on macOS via a
launchd service or sshd (for a remote build), it gets a certificate
bundle.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/libstore/globals.cc b/src/libstore/globals.cc
index 2aceed2705..935018132d 100644
--- a/src/libstore/globals.cc
+++ b/src/libstore/globals.cc
@@ -41,7 +41,15 @@ Settings::Settings()
 {
     buildUsersGroup = getuid() == 0 ? "nixbld" : "";
     lockCPU = getEnv("NIX_AFFINITY_HACK", "1") == "1";
-    caFile = getEnv("NIX_SSL_CERT_FILE", getEnv("SSL_CERT_FILE", "/etc/ssl/certs/ca-certificates.crt"));
+
+    caFile = getEnv("NIX_SSL_CERT_FILE", getEnv("SSL_CERT_FILE", ""));
+    if (caFile == "") {
+        for (auto & fn : {"/etc/ssl/certs/ca-certificates.crt", "/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt"})
+            if (pathExists(fn)) {
+                caFile = fn;
+                break;
+            }
+    }
 
     /* Backwards compatibility. */
     auto s = getEnv("NIX_REMOTE_SYSTEMS");