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diff --git a/src/corelib/time/qtimezoneprivate_tz.cpp b/src/corelib/time/qtimezoneprivate_tz.cpp
index 627a4a81..a5f50acc 100644
--- a/src/corelib/time/qtimezoneprivate_tz.cpp
+++ b/src/corelib/time/qtimezoneprivate_tz.cpp
@@ -51,7 +51,11 @@ typedef QHash<QByteArray, QTzTimeZone> QTzTimeZoneHash;
// Parse zone.tab table, assume lists all installed zones, if not will need to read directories
static QTzTimeZoneHash loadTzTimeZones()
{
- QString path = QStringLiteral("/usr/share/zoneinfo/zone.tab");
+ // Try TZDIR first, in case we're running on NixOS.
+ QString path = QFile::decodeName(qgetenv("TZDIR")) + QStringLiteral("/zone.tab");
+ // Fallback to traditional paths in case we are not on NixOS.
+ if (!QFile::exists(path))
+ path = QStringLiteral("/usr/share/zoneinfo/zone.tab");
if (!QFile::exists(path))
path = QStringLiteral("/usr/lib/zoneinfo/zone.tab");
@@ -727,18 +731,21 @@ QTzTimeZoneCacheEntry QTzTimeZoneCache::findEntry(const QByteArray &ianaId)
if (!tzif.open(QIODevice::ReadOnly))
return ret;
} else {
- // Open named tz, try modern path first, if fails try legacy path
- tzif.setFileName("/usr/share/zoneinfo/"_L1 + QString::fromLocal8Bit(ianaId));
+ // Try TZDIR first, in case we're running on NixOS
+ tzif.setFileName(QFile::decodeName(qgetenv("TZDIR")) + QStringLiteral("/") + QString::fromLocal8Bit(ianaId));
if (!tzif.open(QIODevice::ReadOnly)) {
- tzif.setFileName("/usr/lib/zoneinfo/"_L1 + QString::fromLocal8Bit(ianaId));
+ tzif.setFileName(QLatin1String("/usr/share/zoneinfo/") + QString::fromLocal8Bit(ianaId));
if (!tzif.open(QIODevice::ReadOnly)) {
- // ianaId may be a POSIX rule, taken from $TZ or /etc/TZ
- auto check = validatePosixRule(ianaId);
- if (check.isValid) {
- ret.m_hasDst = check.hasDst;
- ret.m_posixRule = ianaId;
+ tzif.setFileName("/usr/lib/zoneinfo/"_L1 + QString::fromLocal8Bit(ianaId));
+ if (!tzif.open(QIODevice::ReadOnly)) {
+ // ianaId may be a POSIX rule, taken from $TZ or /etc/TZ
+ auto check = validatePosixRule(ianaId);
+ if (check.isValid) {
+ ret.m_hasDst = check.hasDst;
+ ret.m_posixRule = ianaId;
+ }
+ return ret;
}
- return ret;
}
}
}
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