diff --git a/meson-utils/export-all-symbols/meson.build b/meson-utils/export-all-symbols/meson.build
new file mode 100644
index 000000000..d7c086749
--- /dev/null
+++ b/meson-utils/export-all-symbols/meson.build
@@ -0,0 +1,11 @@
+if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
+  # Windows DLLs are stricter about symbol visibility than Unix shared
+  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
+  # This is a temporary sledgehammer to export everything like on Unix,
+  # and not detail with this yet.
+  #
+  # TODO do not do this, and instead do fine-grained export annotations.
+  linker_export_flags = ['-Wl,--export-all-symbols']
+else
+  linker_export_flags = []
+endif
diff --git a/src/libexpr-c/meson.build b/src/libexpr-c/meson.build
index 50616d0d8..b242c2d8e 100644
--- a/src/libexpr-c/meson.build
+++ b/src/libexpr-c/meson.build
@@ -79,17 +79,7 @@ headers = [config_h] + files(
   'nix_api_value.h',
 )
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter ab_subprojectout symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 this_library = library(
   'nixexprc',
diff --git a/src/libexpr-test-support/meson.build b/src/libexpr-test-support/meson.build
index 5dbc6b1b5..4209a4464 100644
--- a/src/libexpr-test-support/meson.build
+++ b/src/libexpr-test-support/meson.build
@@ -63,17 +63,7 @@ headers = files(
   'tests/value/context.hh',
 )
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 this_library = library(
   'nix-expr-test-support',
diff --git a/src/libexpr-test/meson.build b/src/libexpr-test/meson.build
index cf1c48729..11ab5c6e2 100644
--- a/src/libexpr-test/meson.build
+++ b/src/libexpr-test/meson.build
@@ -31,17 +31,7 @@ deps_public_maybe_subproject = [
 ]
 subdir('meson-utils/subprojects')
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')
 deps_private += rapidcheck
diff --git a/src/libfetchers-test/meson.build b/src/libfetchers-test/meson.build
index 7f35cbeca..846d2d70a 100644
--- a/src/libfetchers-test/meson.build
+++ b/src/libfetchers-test/meson.build
@@ -29,17 +29,7 @@ deps_public_maybe_subproject = [
 ]
 subdir('meson-utils/subprojects')
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')
 deps_private += rapidcheck
diff --git a/src/libflake-test/meson.build b/src/libflake-test/meson.build
index 1a488ec13..e4665ce9c 100644
--- a/src/libflake-test/meson.build
+++ b/src/libflake-test/meson.build
@@ -32,17 +32,7 @@ deps_public_maybe_subproject = [
 ]
 subdir('meson-utils/subprojects')
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')
 deps_private += rapidcheck
diff --git a/src/libstore-c/meson.build b/src/libstore-c/meson.build
index 3e59050fd..b86209720 100644
--- a/src/libstore-c/meson.build
+++ b/src/libstore-c/meson.build
@@ -71,17 +71,7 @@ headers = [config_h] + files(
   'nix_api_store.h',
 )
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter ab_subprojectout symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 this_library = library(
   'nixstorec',
diff --git a/src/libstore-test-support/meson.build b/src/libstore-test-support/meson.build
index 959125561..9c798e9cb 100644
--- a/src/libstore-test-support/meson.build
+++ b/src/libstore-test-support/meson.build
@@ -65,17 +65,7 @@ headers = files(
   'tests/protocol.hh',
 )
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 this_library = library(
   'nix-store-test-support',
diff --git a/src/libstore-test/meson.build b/src/libstore-test/meson.build
index 4469c6d6a..3ec7fbbd7 100644
--- a/src/libstore-test/meson.build
+++ b/src/libstore-test/meson.build
@@ -28,17 +28,7 @@ deps_public_maybe_subproject = [
 ]
 subdir('meson-utils/subprojects')
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')
 deps_private += rapidcheck
diff --git a/src/libstore/meson.build b/src/libstore/meson.build
index d5dcb1931..a552fc819 100644
--- a/src/libstore/meson.build
+++ b/src/libstore/meson.build
@@ -401,12 +401,7 @@ foreach name, value : cpp_str_defines
   ]
 endforeach
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # See note in `../nix-util/meson.build`
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 this_library = library(
   'nixstore',
diff --git a/src/libutil-c/meson.build b/src/libutil-c/meson.build
index 35338cbbc..b8c74bf11 100644
--- a/src/libutil-c/meson.build
+++ b/src/libutil-c/meson.build
@@ -68,17 +68,7 @@ headers = [config_h] + files(
   'nix_api_util.h',
 )
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter ab_subprojectout symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 this_library = library(
   'nixutilc',
diff --git a/src/libutil-test-support/meson.build b/src/libutil-test-support/meson.build
index 1b8a14355..4239003c5 100644
--- a/src/libutil-test-support/meson.build
+++ b/src/libutil-test-support/meson.build
@@ -60,17 +60,7 @@ headers = files(
   'tests/string_callback.hh',
 )
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 this_library = library(
   'nix-util-test-support',
diff --git a/src/libutil-test/meson.build b/src/libutil-test/meson.build
index 36e8c2288..8d9d32151 100644
--- a/src/libutil-test/meson.build
+++ b/src/libutil-test/meson.build
@@ -25,17 +25,7 @@ deps_public_maybe_subproject = [
 ]
 subdir('meson-utils/subprojects')
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 rapidcheck = dependency('rapidcheck')
 deps_private += rapidcheck
diff --git a/src/libutil/meson.build b/src/libutil/meson.build
index d0e9f02c4..84e47b4b4 100644
--- a/src/libutil/meson.build
+++ b/src/libutil/meson.build
@@ -257,17 +257,7 @@ else
   subdir('unix')
 endif
 
-if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
-  # Windows DLLs are stricter about symbol visibility than Unix shared
-  # objects --- see https://gcc.gnu.org/wiki/Visibility for details.
-  # This is a temporary sledgehammer to export everything like on Unix,
-  # and not detail with this yet.
-  #
-  # TODO do not do this, and instead do fine-grained export annotations.
-  linker_export_flags = ['-Wl,--export-all-symbols']
-else
-  linker_export_flags = []
-endif
+subdir('meson-utils/export-all-symbols')
 
 this_library = library(
   'nixutil',