diff --git a/index/ap/apq.toml b/index/ap/apq.toml
index e298a7a6..fcb299b6 100644
--- a/index/ap/apq.toml
+++ b/index/ap/apq.toml
@@ -10,3 +10,7 @@ project-files = ["apq.gpr"]
 
 ['3.2.0']
 origin = "git+https://github.com/alire-project/apq.git@3b5b4b99f528f853e02abf239da7db3d8c9962b4"
+
+    ['3.2.0'.available.'case(compiler)']
+    'gnat-community-2018' = false # Because of -gnat05
+    '...' = true
diff --git a/index/ma/mathpaqs.toml b/index/ma/mathpaqs.toml
index d89acb1f..eb4a64a7 100644
--- a/index/ma/mathpaqs.toml
+++ b/index/ma/mathpaqs.toml
@@ -12,6 +12,10 @@ maintainers = ["alejandro@mosteo.com"]
 origin = "git+https://github.com/svn2github/Mathpaqs.git@0f406899a339b654b247a4017557b0943c431486"
 executables = ["test_discrete_random_simulation"]
 
+    [20180327.available.'case(compiler)']
+    'gnat-community-2018' = false
+    '...' = true
+
 ['20180114']
 origin = "git+https://github.com/svn2github/Mathpaqs.git@c17a6725c4b559ea55b64f0cf3c3660e558777ea"
 executables = [
@@ -22,3 +26,7 @@ executables = [
    "test_generic_real_linear_equations", "test_normal", "test_pareto",
    "test_poisson", "test_qr", "test_random_performance", "test_rsa",
    "test_samples", "test_sparse", "test_u_rand"]
+   
+    [20180114.available.'case(compiler)']
+    'gnat-community-2018' = false
+    '...' = true
diff --git a/index/pr/pragmarc.toml b/index/pr/pragmarc.toml
index 839b73f0..efb22739 100644
--- a/index/pr/pragmarc.toml
+++ b/index/pr/pragmarc.toml
@@ -11,6 +11,14 @@ executables = ["compile_all"]
 origin = "git+https://github.com/alire-project/PragmARC.git@db6c1730fe825f8303c60b48f82db08bd408588d"
 notes = "ISO/IEC 8652:2007 version"
 
+    ['2017.2007.0'.available.'case(compiler)']
+    'gnat-community-2018' = false
+    '...' = true
+
 ['2011.1995.0']
 origin = "git+https://github.com/alire-project/PragmARC.git@34b0e12b5f9aea63408c94cc48ba7a16687c8d76"
 notes = "Ada 95 version"
+
+    ['2011.1995.0'.available.'case(compiler)']
+    'gnat-community-2018' = false
+    '...' = true