disable ffPackagesGetNix on when it is not defined

Author: yelninei

src/detection/packages/packages_linux.c

@@ -418,11 +418,13 @@ static void getPackageCounts(FFstrbuf* baseDir, FFPackagesResult* packageCounts,
     if (!(options->disabled & FF_PACKAGES_FLAG_EMERGE_BIT)) packageCounts->emerge += countFilesRecursive(baseDir, "/var/db/pkg", "SIZE");
     if (!(options->disabled & FF_PACKAGES_FLAG_EOPKG_BIT)) packageCounts->eopkg += getNumElements(baseDir, "/var/lib/eopkg/package", true);
     if (!(options->disabled & FF_PACKAGES_FLAG_FLATPAK_BIT)) packageCounts->flatpakSystem += getFlatpakPackages(baseDir, "/var/lib");
+    #if defined(__linux__) || defined(__APPLE__)
     if (!(options->disabled & FF_PACKAGES_FLAG_NIX_BIT))
     {
         packageCounts->nixDefault += ffPackagesGetNix(baseDir, "/nix/var/nix/profiles/default");
         packageCounts->nixSystem += ffPackagesGetNix(baseDir, "/run/current-system");
     }
+    #endif
     if (!(options->disabled & FF_PACKAGES_FLAG_PACMAN_BIT)) packageCounts->pacman += getNumElements(baseDir, "/var/lib/pacman/local", true);
     if (!(options->disabled & FF_PACKAGES_FLAG_LPKGBUILD_BIT)) packageCounts->lpkgbuild += getNumElements(baseDir, "/opt/Loc-OS-LPKG/lpkgbuild/remove", false);
     if (!(options->disabled & FF_PACKAGES_FLAG_PKGTOOL_BIT)) packageCounts->pkgtool += getNumElements(baseDir, "/var/log/packages", false);
@@ -517,7 +519,7 @@ void ffDetectPackagesImpl(FFPackagesResult* result, FFPackagesOptions* options)
     #endif
 
     ffStrbufSet(&baseDir, &instance.state.platform.homeDir);
-
+    #if defined(__linux__) || defined(__APPLE__)
     if (!(options->disabled & FF_PACKAGES_FLAG_NIX_BIT))
     {
         // Count packages from $HOME/.nix-profile
@@ -542,6 +544,7 @@ void ffDetectPackagesImpl(FFPackagesResult* result, FFPackagesOptions* options)
         FF_STRBUF_AUTO_DESTROY userPkgsDir = ffStrbufCreateStatic("/etc/profiles/per-user/");
         result->nixUser += ffPackagesGetNix(&userPkgsDir, instance.state.platform.userName.chars);
     }
+    #endif
 
     if (!(options->disabled & FF_PACKAGES_FLAG_GUIX_BIT))
     {