diff --git a/pkgs/development/compilers/gcc/12/default.nix b/pkgs/development/compilers/gcc/12/default.nix
index 1a4af0ab2869..4287e4d67d45 100644
--- a/pkgs/development/compilers/gcc/12/default.nix
+++ b/pkgs/development/compilers/gcc/12/default.nix
@@ -112,6 +112,9 @@ let majorVersion = "12";
       # Fix detection of bootstrap compiler Ada support (cctools as) on Nix Darwin
       ++ optional (stdenv.isDarwin && langAda) ../ada-cctools-as-detection-configure.patch
 
+      # Use absolute path in GNAT dylib install names on Darwin
+      ++ optional (stdenv.isDarwin && langAda) ../gnat-darwin-dylib-install-name.patch
+
       # Obtain latest patch with ../update-mcfgthread-patches.sh
       ++ optional (!crossStageStatic && targetPlatform.isMinGW && threadsCross.model == "mcf") ./Added-mcf-thread-model-support-from-mcfgthread.patch;
 
diff --git a/pkgs/development/compilers/gcc/gnat-darwin-dylib-install-name.patch b/pkgs/development/compilers/gcc/gnat-darwin-dylib-install-name.patch
new file mode 100644
index 000000000000..01e5de86a438
--- /dev/null
+++ b/pkgs/development/compilers/gcc/gnat-darwin-dylib-install-name.patch
@@ -0,0 +1,19 @@
+--- a/gcc/ada/gcc-interface/Makefile.in	2022-08-19 18:09:52.000000000 +1000
++++ b/gcc/ada/gcc-interface/Makefile.in	2023-01-11 01:54:06.000000000 +1100
+@@ -795,14 +795,14 @@
+ 		-o libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+ 		$(GNATRTL_NONTASKING_OBJS) $(LIBGNAT_OBJS) \
+ 		$(SO_OPTS) \
+-		-Wl,-install_name,@rpath/libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
++		-Wl,-install_name,$(ADA_RTL_DSO_DIR)/libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+ 		$(MISCLIB)
+ 	cd $(RTSDIR); `echo "$(GCC_FOR_TARGET)" \
+                 | sed -e 's,\./xgcc,../../xgcc,' -e 's,-B\./,-B../../,'` -dynamiclib $(PICFLAG_FOR_TARGET) \
+ 		-o libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+ 		$(GNATRTL_TASKING_OBJS) \
+ 		$(SO_OPTS) \
+-		-Wl,-install_name,@rpath/libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
++		-Wl,-install_name,$(ADA_RTL_DSO_DIR)/libgnarl$(hyphen)$(LIBRARY_VERSION)$(soext) \
+ 		$(THREADSLIB) -Wl,libgnat$(hyphen)$(LIBRARY_VERSION)$(soext)
+ 	cd $(RTSDIR); $(LN_S) libgnat$(hyphen)$(LIBRARY_VERSION)$(soext) \
+ 		libgnat$(soext)