diff --git a/Source/Processes/AuProcess.Unix.cpp b/Source/Processes/AuProcess.Unix.cpp
index 45511926..8103c228 100644
--- a/Source/Processes/AuProcess.Unix.cpp
+++ b/Source/Processes/AuProcess.Unix.cpp
@@ -34,6 +34,20 @@
     #endif
 #endif
 
+
+#if defined(AURORA_PLATFORM_BSD)
+    #if defined(__FreeBSD__)
+        #include <sys/param.h>
+    #endif
+
+    #include <sys/cpuset.h>
+#endif
+
+#if defined(AURORA_IS_LINUX_DERIVED)
+    #include <sched.h>
+#endif
+
+
 namespace Aurora::Processes
 {
     static AuThreadPrimitives::RWLockUnique_t gRWLock;
@@ -521,6 +535,62 @@ namespace Aurora::Processes
             ::chroot(this->startup_.workingDirectory.value().c_str());
         }
     #endif
+
+        if (this->startup_.optAffinity)
+        {
+            auto affinity = this->startup_.optAffinity.Value();
+
+            #if defined(__FreeBSD__)
+            
+                cpuset_setid(CPU_WHICH_PID, -1, (cpusetid_t *)&affinity.lower); // I guess?
+            
+            #elif defined(AURORA_IS_LINUX_DERIVED) || (defined(AURORA_IS_POSIX_DERIVED) && defined(_GNU_SOURCE))
+
+                cpu_set_t cpuset;
+                CPU_ZERO(&cpuset);
+                
+                AuUInt8 index {};
+                while (affinity.CpuBitScanForward(index, index))
+                {
+                    CPU_SET(index, &cpuset);
+                    index++;
+                }
+
+                if (!CPU_COUNT(&cpuset))
+                {
+                    return;
+                }
+
+                #if defined(AURORA_IS_LINUX_DERIVED) 
+                    sched_setaffinity(0, sizeof(cpu_set_t), &cpuset);
+                #else
+                    pthread_setaffinity_np(pthread_self(), cpuset_size(cpuSet), &cpuset);
+                #endif
+
+            #elif defined(AURORA_IS_POSIX_DERIVED)
+                
+                if (auto cpuSet = cpuset_alloc())
+                {
+                    cpuset_init(cpuSet);
+
+                    AuUInt8 index {};
+                    while (affinity.CpuBitScanForward(index, index))
+                    {
+                        cpuset_set_cpu(cpuSet, index, 1);
+                        index++;
+                    }
+
+                    pthread_setaffinity_np(pthread_self(), cpuset_size(cpuSet), cpuSet);
+
+                    cpuset_free(cpuSet);
+                }
+
+            #else
+                
+                // Who else?
+
+            #endif
+        }
     
         ::execv(this->startup_.process.c_str(), (char * const *)this->cargs_.data()); // https://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html