diff -urN farmhash-orig/src/farmhash.cc farmhash/src/farmhash.cc
--- farmhash-orig/src/farmhash.cc	2023-06-12 16:17:46.368276854 -0400
+++ farmhash/src/farmhash.cc	2023-06-12 16:17:58.404968718 -0400
@@ -412,7 +412,6 @@
 
 }  // namespace NAMESPACE_FOR_HASH_FUNCTIONS
 
-using namespace std;
 using namespace NAMESPACE_FOR_HASH_FUNCTIONS;
 namespace farmhashna {
 #undef Fetch
@@ -481,7 +480,7 @@
 
 // Return a 16-byte hash for 48 bytes.  Quick and dirty.
 // Callers do best to use "random-looking" values for a and b.
-STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
+STATIC_INLINE std::pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
     uint64_t w, uint64_t x, uint64_t y, uint64_t z, uint64_t a, uint64_t b) {
   a += w;
   b = Rotate(b + a + z, 21);
@@ -489,11 +488,11 @@
   a += x;
   a += y;
   b += Rotate(a, 44);
-  return make_pair(a + z, b + c);
+  return std::make_pair(a + z, b + c);
 }
 
 // Return a 16-byte hash for s[0] ... s[31], a, and b.  Quick and dirty.
-STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
+STATIC_INLINE std::pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
     const char* s, uint64_t a, uint64_t b) {
   return WeakHashLen32WithSeeds(Fetch(s),
                                 Fetch(s + 8),
@@ -537,8 +536,8 @@
   uint64_t x = seed;
   uint64_t y = seed * k1 + 113;
   uint64_t z = ShiftMix(y * k2 + 113) * k2;
-  pair<uint64_t, uint64_t> v = make_pair(0, 0);
-  pair<uint64_t, uint64_t> w = make_pair(0, 0);
+  std::pair<uint64_t, uint64_t> v = std::make_pair(0, 0);
+  std::pair<uint64_t, uint64_t> w = std::make_pair(0, 0);
   x = x * k2 + Fetch(s);
 
   // Set end so that after the loop we have 1 to 64 bytes left to process.
@@ -610,8 +609,8 @@
   uint64_t x = seed0;
   uint64_t y = seed1 * k2 + 113;
   uint64_t z = farmhashna::ShiftMix(y * k2) * k2;
-  pair<uint64_t, uint64_t> v = make_pair(seed0, seed1);
-  pair<uint64_t, uint64_t> w = make_pair(0, 0);
+  std::pair<uint64_t, uint64_t> v = std::make_pair(seed0, seed1);
+  std::pair<uint64_t, uint64_t> w = std::make_pair(0, 0);
   uint64_t u = x - z;
   x *= k2;
   uint64_t mul = k2 + (u & 0x82);
@@ -1744,7 +1743,7 @@
 
 // Return a 16-byte hash for 48 bytes.  Quick and dirty.
 // Callers do best to use "random-looking" values for a and b.
-STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
+STATIC_INLINE std::pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
     uint64_t w, uint64_t x, uint64_t y, uint64_t z, uint64_t a, uint64_t b) {
   a += w;
   b = Rotate(b + a + z, 21);
@@ -1752,11 +1751,11 @@
   a += x;
   a += y;
   b += Rotate(a, 44);
-  return make_pair(a + z, b + c);
+  return std::make_pair(a + z, b + c);
 }
 
 // Return a 16-byte hash for s[0] ... s[31], a, and b.  Quick and dirty.
-STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
+STATIC_INLINE std::pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
     const char* s, uint64_t a, uint64_t b) {
   return WeakHashLen32WithSeeds(Fetch(s),
                                 Fetch(s + 8),
@@ -1807,7 +1806,7 @@
 
   // We expect len >= 128 to be the common case.  Keep 56 bytes of state:
   // v, w, x, y, and z.
-  pair<uint64_t, uint64_t> v, w;
+  std::pair<uint64_t, uint64_t> v, w;
   uint64_t x = Uint128Low64(seed);
   uint64_t y = Uint128High64(seed);
   uint64_t z = len * k1;