diff --git a/BasiliskII/src/Unix/configure.ac b/BasiliskII/src/Unix/configure.ac
index 32be2e27..b8aa82c8 100644
--- a/BasiliskII/src/Unix/configure.ac
+++ b/BasiliskII/src/Unix/configure.ac
@@ -866,7 +866,7 @@ AC_CACHE_CHECK([whether vm_protect works],
     AC_TRY_RUN([
       #define CONFIGURE_TEST_VM_MAP
       #define TEST_VM_PROT_$test_def
-      #include "vm_alloc.cpp"
+      #include "../CrossPlatform/vm_alloc.cpp"
     ], ac_cv_vm_protect_works=no, rm -f core,
     dnl When cross-compiling, do not assume anything
     ac_cv_vm_protect_works="guessing no"
@@ -875,7 +875,7 @@ AC_CACHE_CHECK([whether vm_protect works],
   AC_TRY_RUN([
     #define CONFIGURE_TEST_VM_MAP
     #define TEST_VM_PROT_RDWR_WRITE
-    #include "vm_alloc.cpp"
+    #include "../CrossPlatform/vm_alloc.cpp"
   ], , ac_cv_vm_protect_works=no,
   dnl When cross-compiling, do not assume anything
   ac_cv_vm_protect_works="guessing no"
@@ -920,7 +920,7 @@ AC_CACHE_CHECK([whether mmap supports MAP_ANON],
     #define HAVE_MMAP_ANON
     #define CONFIGURE_TEST_VM_MAP
     #define TEST_VM_MMAP_ANON
-    #include "vm_alloc.cpp"
+    #include "../CrossPlatform/vm_alloc.cpp"
   ], ac_cv_mmap_anon=yes, ac_cv_mmap_anon=no,
   dnl When cross-compiling, do not assume anything.
   ac_cv_mmap_anon="guessing no"
@@ -939,7 +939,7 @@ AC_CACHE_CHECK([whether mmap supports MAP_ANONYMOUS],
     #define HAVE_MMAP_ANONYMOUS
     #define CONFIGURE_TEST_VM_MAP
     #define TEST_VM_MMAP_ANON
-    #include "vm_alloc.cpp"
+    #include "../CrossPlatform/vm_alloc.cpp"
   ], ac_cv_mmap_anonymous=yes, ac_cv_mmap_anonymous=no,
   dnl When cross-compiling, do not assume anything.
   ac_cv_mmap_anonymous="guessing no"
@@ -960,7 +960,7 @@ AC_CACHE_CHECK([whether mprotect works],
     AC_TRY_RUN([
       #define CONFIGURE_TEST_VM_MAP
       #define TEST_VM_PROT_$test_def
-      #include "vm_alloc.cpp"
+      #include "../CrossPlatform/vm_alloc.cpp"
     ], ac_cv_mprotect_works=no, rm -f core,
     dnl When cross-compiling, do not assume anything
     ac_cv_mprotect_works="guessing no"
@@ -969,7 +969,7 @@ AC_CACHE_CHECK([whether mprotect works],
   AC_TRY_RUN([
     #define CONFIGURE_TEST_VM_MAP
     #define TEST_VM_PROT_RDWR_WRITE
-    #include "vm_alloc.cpp"
+    #include "../CrossPlatform/vm_alloc.cpp"
   ], , ac_cv_mprotect_works=no,
   dnl When cross-compiling, do not assume anything
   ac_cv_mprotect_works="guessing no"
@@ -1009,7 +1009,7 @@ AC_CACHE_CHECK([whether we can map Low Memory area 0x0000-0x2000],
   AC_LANG_SAVE
   AC_LANG_CPLUSPLUS
   AC_TRY_RUN([
-    #include "vm_alloc.cpp"
+    #include "../CrossPlatform/vm_alloc.cpp"
     int main(void) { /* returns 0 if we could map the lowmem globals */
       volatile char * lm = 0;
       if (vm_init() < 0) exit(1);
@@ -1098,8 +1098,8 @@ AC_CACHE_CHECK([whether your system supports Mach exceptions],
     #define HAVE_MACH_TASK_SELF 1
     #define HAVE_MACH_EXCEPTIONS 1
     #define CONFIGURE_TEST_SIGSEGV_RECOVERY
-    #include "vm_alloc.cpp"
-    #include "sigsegv.cpp"
+    #include "../CrossPlatform/vm_alloc.cpp"
+    #include "../CrossPlatform/sigsegv.cpp"
   ], [
   sigsegv_recovery=mach
   ac_cv_have_mach_exceptions=yes
@@ -1122,8 +1122,8 @@ AC_CACHE_CHECK([whether your system supports Windows exceptions],
   AC_TRY_RUN([
     #define HAVE_WIN32_EXCEPTIONS 1
     #define CONFIGURE_TEST_SIGSEGV_RECOVERY
-    #include "vm_alloc.cpp"
-    #include "sigsegv.cpp"
+    #include "../CrossPlatform/vm_alloc.cpp"
+    #include "../CrossPlatform/sigsegv.cpp"
   ], [
   sigsegv_recovery=win32
   ac_cv_have_win32_exceptions=yes
@@ -1151,8 +1151,8 @@ if [[ -z "$sigsegv_recovery" ]]; then
       #define HAVE_ASM_UCONTEXT 1
       #define HAVE_SIGINFO_T 1
       #define CONFIGURE_TEST_SIGSEGV_RECOVERY
-      #include "vm_alloc.cpp"
-      #include "sigsegv.cpp"
+      #include "../CrossPlatform/vm_alloc.cpp"
+      #include "../CrossPlatform/sigsegv.cpp"
     ], [
     sigsegv_recovery=siginfo
     ac_cv_have_asm_extended_signals=yes
@@ -1181,8 +1181,8 @@ if [[ -z "$sigsegv_recovery" ]]; then
       #endif
       #define HAVE_SIGINFO_T 1
       #define CONFIGURE_TEST_SIGSEGV_RECOVERY
-      #include "vm_alloc.cpp"
-      #include "sigsegv.cpp"
+      #include "../CrossPlatform/vm_alloc.cpp"
+      #include "../CrossPlatform/sigsegv.cpp"
     ], [
     sigsegv_recovery=siginfo
     ac_cv_have_extended_signals=yes
@@ -1207,8 +1207,8 @@ if [[ -z "$sigsegv_recovery" ]]; then
     AC_TRY_RUN([
       #define HAVE_SIGCONTEXT_SUBTERFUGE 1
       #define CONFIGURE_TEST_SIGSEGV_RECOVERY
-      #include "vm_alloc.cpp"
-      #include "sigsegv.cpp"
+      #include "../CrossPlatform/vm_alloc.cpp"
+      #include "../CrossPlatform/sigsegv.cpp"
     ], [
     sigsegv_recovery=sigcontext
     ac_cv_have_sigcontext_hack=yes
@@ -1231,8 +1231,8 @@ AC_CACHE_CHECK([whether we can skip instruction in SIGSEGV handler],
   AC_TRY_RUN([
     #define HAVE_SIGSEGV_SKIP_INSTRUCTION 1
     #define CONFIGURE_TEST_SIGSEGV_RECOVERY
-    #include "vm_alloc.cpp"
-    #include "sigsegv.cpp"
+    #include "../CrossPlatform/vm_alloc.cpp"
+    #include "../CrossPlatform/sigsegv.cpp"
   ], ac_cv_have_skip_instruction=yes, ac_cv_have_skip_instruction=no,
   dnl When cross-compiling, do not assume anything.
   ac_cv_have_skip_instruction=no