diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8fb24bd0f..7e1b829cd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -21,8 +21,8 @@ variables:
 
 # Default CI job setup; contrast with `.only-origin`.
 #
-# Don’t execute the pipeline when a merge request is merged into `main`, as it
-# will have already been tested
+# Don’t execute the pipeline when a merge request is merged into `origin/main`,
+# as it will have already been tested
 .only-default:
   only:
     - branches
@@ -30,7 +30,7 @@ variables:
     refs:
       - tags
     variables:
-      - $CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+      - $CI_PIPELINE_SOURCE == "push" && $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH && $CI_PROJECT_NAMESPACE == "GNOME"
 
 # Some jobs run on CI runners which don’t have good isolation between CI jobs,
 # and don’t have much available resource. Limit those jobs to only ones on the
diff --git a/glib/gspawn.c b/glib/gspawn.c
index 0a7bf0a71..3fcc2d659 100644
--- a/glib/gspawn.c
+++ b/glib/gspawn.c
@@ -70,7 +70,7 @@
 #include "glibintl.h"
 #include "glib-unix.h"
 
-#ifdef __APPLE__
+#if defined(__APPLE__) && defined(HAVE_LIBPROC_H)
 #include <libproc.h>
 #include <sys/proc_info.h>
 #endif
@@ -1534,7 +1534,7 @@ safe_fdwalk_with_invalid_fds (int (*cb)(void *data, int fd), void *data)
   if (open_max < 0)
     open_max = 4096;
 
-#if defined(__APPLE__)
+#if defined(__APPLE__) && defined(HAVE_LIBPROC_H)
   /* proc_pidinfo isn't documented as async-signal-safe but looking at the implementation
    * in the darwin tree here:
    *
diff --git a/meson.build b/meson.build
index d875346b4..dbfa8ff35 100644
--- a/meson.build
+++ b/meson.build
@@ -363,6 +363,7 @@ headers = [
   'fstab.h',
   'grp.h',
   'inttypes.h',
+  'libproc.h',
   'limits.h',
   'locale.h',
   'mach/mach_time.h',