SERVER-117754 Fix package task (#46922)

GitOrigin-RevId: 1a517eec36867b580df39f385686ce0aee90c586

buildscripts/packager.py

@@ -943,6 +943,17 @@ def make_rpm(distro, build_os, arch, spec, srcdir):
         f"dynamic_release {spec.prelease()}",
     ]
 
+    # Some build environments may not define a `pathfix` RPM macro even though our spec files
+    # reference it during %prep. Define it here (if available) so rpmbuild can always expand
+    # `%{pathfix}` to an actual file path.
+    pathfix = None
+    for candidate in ("/usr/bin/pathfix.py", "/usr/lib/rpm/redhat/pathfix.py"):
+        if os.path.exists(candidate):
+            pathfix = candidate
+            break
+    if pathfix:
+        flags.extend(["-D", f"pathfix {pathfix}"])
+
     # Versions of RPM after 4.4 ignore our BuildRoot tag so we need to
     # specify it on the command line args to rpmbuild
     if (distro.name() == "suse" and distro.repo_os_version(build_os) == "15") or (