7 files changed, 13 insertions, 13 deletions

diff --git a/src/build-remote/build-remote.cc b/src/build-remote/build-remote.cc
index fb90403a0..99bbc62d5 100644
--- a/src/build-remote/build-remote.cc
+++ b/src/build-remote/build-remote.cc
@@ -236,9 +236,9 @@ static int main_build_remote(int argc, char * * argv)
                 }
 
 #if __APPLE__
-                futimes(bestSlotLock.get(), NULL);
+                futimes(bestSlotLock.get(), nullptr);
 #else
-                futimens(bestSlotLock.get(), NULL);
+                futimens(bestSlotLock.get(), nullptr);
 #endif
 
                 lock.reset();
diff --git a/src/libstore/build/local-derivation-goal.cc b/src/libstore/build/local-derivation-goal.cc
index 7d1d339e8..da2433326 100644
--- a/src/libstore/build/local-derivation-goal.cc
+++ b/src/libstore/build/local-derivation-goal.cc
@@ -1882,7 +1882,7 @@ void LocalDerivationGoal::runChild()
                 sandboxArgs.push_back("_ALLOW_LOCAL_NETWORKING");
                 sandboxArgs.push_back("1");
             }
-            if (sandbox_init_with_parameters(sandboxProfile.c_str(), 0, stringsToCharPtrs(sandboxArgs).data(), NULL)) {
+            if (sandbox_init_with_parameters(sandboxProfile.c_str(), 0, stringsToCharPtrs(sandboxArgs).data(), nullptr)) {
                 writeFull(STDERR_FILENO, "failed to configure sandbox\n");
                 _exit(1);
             }
diff --git a/src/libstore/globals.cc b/src/libstore/globals.cc
index 02d26e034..6cfa3ffac 100644
--- a/src/libstore/globals.cc
+++ b/src/libstore/globals.cc
@@ -177,14 +177,14 @@ static bool hasVirt() {
     size_t size;
 
     size = sizeof(hasVMM);
-    if (sysctlbyname("kern.hv_vmm_present", &hasVMM, &size, NULL, 0) == 0) {
+    if (sysctlbyname("kern.hv_vmm_present", &hasVMM, &size, nullptr, 0) == 0) {
         if (hasVMM)
             return false;
     }
 
     // whether the kernel and hardware supports virt
     size = sizeof(hvSupport);
-    if (sysctlbyname("kern.hv_support", &hvSupport, &size, NULL, 0) == 0) {
+    if (sysctlbyname("kern.hv_support", &hvSupport, &size, nullptr, 0) == 0) {
         return hvSupport == 1;
     } else {
         return false;
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index 10d43ee3e..f09d1bdab 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -557,7 +557,7 @@ void LocalStore::openDB(State & state, bool create)
         if (sqlite3_exec(db, "pragma main.journal_size_limit = 1099511627776;", 0, 0, 0) != SQLITE_OK)
             SQLiteError::throw_(db, "setting journal_size_limit");
         int enable = 1;
-        if (sqlite3_file_control(db, NULL, SQLITE_FCNTL_PERSIST_WAL, &enable) != SQLITE_OK)
+        if (sqlite3_file_control(db, nullptr, SQLITE_FCNTL_PERSIST_WAL, &enable) != SQLITE_OK)
             SQLiteError::throw_(db, "setting persistent WAL mode");
     }
 
diff --git a/src/libstore/platform/darwin.cc b/src/libstore/platform/darwin.cc
index 83b4b4183..1b591fde3 100644
--- a/src/libstore/platform/darwin.cc
+++ b/src/libstore/platform/darwin.cc
@@ -235,15 +235,15 @@ void DarwinLocalDerivationGoal::execBuilder(std::string builder, Strings args, S
     if (drv->platform == "aarch64-darwin") {
         // Unset kern.curproc_arch_affinity so we can escape Rosetta
         int affinity = 0;
-        sysctlbyname("kern.curproc_arch_affinity", NULL, NULL, &affinity, sizeof(affinity));
+        sysctlbyname("kern.curproc_arch_affinity", nullptr, nullptr, &affinity, sizeof(affinity));
 
         cpu_type_t cpu = CPU_TYPE_ARM64;
-        posix_spawnattr_setbinpref_np(&attrp, 1, &cpu, NULL);
+        posix_spawnattr_setbinpref_np(&attrp, 1, &cpu, nullptr);
     } else if (drv->platform == "x86_64-darwin") {
         cpu_type_t cpu = CPU_TYPE_X86_64;
-        posix_spawnattr_setbinpref_np(&attrp, 1, &cpu, NULL);
+        posix_spawnattr_setbinpref_np(&attrp, 1, &cpu, nullptr);
     }
 
-    posix_spawn(NULL, builder.c_str(), NULL, &attrp, stringsToCharPtrs(args).data(), stringsToCharPtrs(envStrs).data());
+    posix_spawn(nullptr, builder.c_str(), nullptr, &attrp, stringsToCharPtrs(args).data(), stringsToCharPtrs(envStrs).data());
 }
 }
diff --git a/src/libutil/tarfile.cc b/src/libutil/tarfile.cc
index 760a5a65a..c7f9499fd 100644
--- a/src/libutil/tarfile.cc
+++ b/src/libutil/tarfile.cc
@@ -54,7 +54,7 @@ TarArchive::TarArchive(Source & source, bool raw) : buffer(65536)
         archive_read_support_format_raw(archive);
         archive_read_support_format_empty(archive);
     }
-    archive_read_set_option(archive, NULL, "mac-ext", NULL);
+    archive_read_set_option(archive, nullptr, "mac-ext", nullptr);
     check(archive_read_open(archive, (void *)this, callback_open, callback_read, callback_close), "Failed to open archive (%s)");
 }
 
@@ -65,7 +65,7 @@ TarArchive::TarArchive(const Path & path)
 
     archive_read_support_filter_all(archive);
     archive_read_support_format_all(archive);
-    archive_read_set_option(archive, NULL, "mac-ext", NULL);
+    archive_read_set_option(archive, nullptr, "mac-ext", nullptr);
     check(archive_read_open_filename(archive, path.c_str(), 16384), "failed to open archive: %s");
 }
 
diff --git a/src/resolve-system-dependencies/resolve-system-dependencies.cc b/src/resolve-system-dependencies/resolve-system-dependencies.cc
index 2c4b06791..319f7108e 100644
--- a/src/resolve-system-dependencies/resolve-system-dependencies.cc
+++ b/src/resolve-system-dependencies/resolve-system-dependencies.cc
@@ -48,7 +48,7 @@ std::set<std::string> runResolver(const Path & filename)
         return {};
     }
 
-    char* obj = (char*) mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd.get(), 0);
+    char* obj = (char*) mmap(nullptr, st.st_size, PROT_READ, MAP_SHARED, fd.get(), 0);
     if (!obj)
         throw SysError("mmapping '%s'", filename);