diff --git a/Projects/AthDataQuality/CMakeLists.txt b/Projects/AthDataQuality/CMakeLists.txt
index bc60c4d2608a5f82bd14a87365fb314279833c75..a38c05f8816f374a07de2bbdd6380c92bbe49f8d 100644
--- a/Projects/AthDataQuality/CMakeLists.txt
+++ b/Projects/AthDataQuality/CMakeLists.txt
@@ -18,7 +18,7 @@ set( TDAQ-COMMON_ATROOT
 find_package( AtlasCMake REQUIRED )
 
 # Build the project against LCG:
-set( LCG_VERSION_POSTFIX "a"
+set( LCG_VERSION_POSTFIX "a_ATLAS_1"
    CACHE STRING "Version postfix for the LCG release to use" )
 set( LCG_VERSION_NUMBER 97
    CACHE STRING "Version number for the LCG release to use" )
diff --git a/Projects/AthGeneration/build_externals.sh b/Projects/AthGeneration/build_externals.sh
index 4de9824dc2459e96da1775051adee5ca20d87d2e..26b6322843cfc0921664c4378e729ccb81c60eaf 100755
--- a/Projects/AthGeneration/build_externals.sh
+++ b/Projects/AthGeneration/build_externals.sh
@@ -24,7 +24,7 @@ BUILDDIR=""
 BUILDTYPE="RelWithDebInfo"
 FORCE=""
 CI=""
-EXTRACMAKE=(-DLCG_VERSION_NUMBER=97 -DLCG_VERSION_POSTFIX="a")
+EXTRACMAKE=(-DLCG_VERSION_NUMBER=97 -DLCG_VERSION_POSTFIX="a_ATLAS_1")
 while getopts ":t:b:x:fch" opt; do
     case $opt in
         t)
diff --git a/Projects/AthSimulation/build_externals.sh b/Projects/AthSimulation/build_externals.sh
index 7638a095be2b147662dab458fdef5343ae352b54..640a10702acefce7155092f564fe5b385b74931d 100755
--- a/Projects/AthSimulation/build_externals.sh
+++ b/Projects/AthSimulation/build_externals.sh
@@ -24,7 +24,7 @@ BUILDDIR=""
 BUILDTYPE="RelWithDebInfo"
 FORCE=""
 CI=""
-EXTRACMAKE=(-DLCG_VERSION_NUMBER=97 -DLCG_VERSION_POSTFIX="a")
+EXTRACMAKE=(-DLCG_VERSION_NUMBER=97 -DLCG_VERSION_POSTFIX="a_ATLAS_1")
 while getopts ":t:b:x:fch" opt; do
     case $opt in
         t)
diff --git a/Projects/Athena/build_externals.sh b/Projects/Athena/build_externals.sh
index 76c1c06bfda4594b2f931e393e117dd83c9155de..6929a21c2e76d3f37fdf1c657685513906213bae 100755
--- a/Projects/Athena/build_externals.sh
+++ b/Projects/Athena/build_externals.sh
@@ -24,7 +24,7 @@ BUILDDIR=""
 BUILDTYPE="RelWithDebInfo"
 FORCE=""
 CI=""
-EXTRACMAKE=(-DLCG_VERSION_NUMBER=97 -DLCG_VERSION_POSTFIX="a")
+EXTRACMAKE=(-DLCG_VERSION_NUMBER=97 -DLCG_VERSION_POSTFIX="a_ATLAS_1")
 while getopts ":t:b:x:fch" opt; do
     case $opt in
         t)
diff --git a/Projects/VP1Light/build_externals.sh b/Projects/VP1Light/build_externals.sh
index dc4fb97d27944b1d597adfff97336a0ee8f9cdad..e2b5c3881f9051696fbea361d078a08523f140cc 100755
--- a/Projects/VP1Light/build_externals.sh
+++ b/Projects/VP1Light/build_externals.sh
@@ -26,7 +26,7 @@ BUILDDIR=""
 BUILDTYPE="RelWithDebInfo"
 FORCE=""
 CI=""
-EXTRACMAKE=(-DLCG_VERSION_NUMBER=97 -DLCG_VERSION_POSTFIX="a")
+EXTRACMAKE=(-DLCG_VERSION_NUMBER=97 -DLCG_VERSION_POSTFIX="a_ATLAS_1")
 while getopts ":t:b:fch" opt; do
     case $opt in
         t)