diff --git a/.github/workflows/alpine.yml b/.github/workflows/alpine.yml
index e0088f952b..0bee577924 100644
--- a/.github/workflows/alpine.yml
+++ b/.github/workflows/alpine.yml
@@ -21,8 +21,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-# Disabled as we rely on DIP1000 `foreach (scope)` which GDC < 12 doesn't support
-#          - { dc: gdc, dcpkg: gcc-gdc, dcbin: gdc  }
+          - { dc: gdc, dcpkg: gcc-gdc, dcbin: gdc  }
           - { dc: ldc, dcpkg: ldc,     dcbin: ldc2 }
           - { dc: dmd, dcpkg: dmd,     dcbin: dmd  }
 
diff --git a/dub.sdl b/dub.sdl
index 2ae42551db..4daba7d392 100644
--- a/dub.sdl
+++ b/dub.sdl
@@ -7,6 +7,9 @@ license "MIT"
 
 targetPath "bin"
 
+excludedSourceFiles \
+	"source/dub/packagesupplier.d" # superseded with dub.packagesuppliers
+
 configuration "application" {
 	targetType "executable"
 	mainSourceFile "source/app.d"
diff --git a/source/dub/internal/dyaml/node.d b/source/dub/internal/dyaml/node.d
index 45a25b77c2..bba358a2cf 100644
--- a/source/dub/internal/dyaml/node.d
+++ b/source/dub/internal/dyaml/node.d
@@ -2598,7 +2598,8 @@ enum castableToNode(T) = (is(T == struct) || is(T == class)) && is(typeof(T.opCa
 @safe unittest
 {
     import dub.internal.dyaml : Loader, Node;
-    import std : split, to;
+    import std.string : split;
+    import std.conv : to;
 
     static class MyClass
     {
@@ -2620,7 +2621,8 @@ enum castableToNode(T) = (is(T == struct) || is(T == class)) && is(typeof(T.opCa
 @safe unittest
 {
     import dub.internal.dyaml : Loader, Node;
-    import std : split, to;
+    import std.string : split;
+    import std.conv : to;
 
     static class MyClass
     {