Invoke Pkg.add with a string, not a VersionNumber.

Author: maleadt

deps/build_local.jl

@@ -33,12 +33,13 @@ llvm_assertions = try
 catch
     true
 end
+llvm_pkg_version = "$(Base.libllvm_version.major).$(Base.libllvm_version.minor)"
 LLVM = if llvm_assertions
-    Pkg.add(name="LLVM_full_assert_jll", version=Base.libllvm_version)
+    Pkg.add(name="LLVM_full_assert_jll", version=llvm_pkg_version)
     using LLVM_full_assert_jll
     LLVM_full_assert_jll
 else
-    Pkg.add(name="LLVM_full_jll", version=Base.libllvm_version)
+    Pkg.add(name="LLVM_full_jll", version=llvm_pkg_version)
     using LLVM_full_jll
     LLVM_full_jll
 end