diff --git a/gnu/packages/llvm.scm b/gnu/packages/llvm.scm
index e81b85d5813..2425c0924e5 100644
--- a/gnu/packages/llvm.scm
+++ b/gnu/packages/llvm.scm
@@ -1082,33 +1082,6 @@ Library.")
                         (string-append (getcwd) "/lib"))))
             (delete 'install-opt-viewer)))))))
 
-(define-public llvm-3.5
-  (package (inherit llvm-6)
-    (version "3.5.2")
-    (source
-     (origin
-       (method url-fetch)
-       (uri (llvm-uri "llvm" version))
-       (patches
-        (search-patches "llvm-3.5-fix-clang-build-with-gcc5.patch"))
-       (sha256
-        (base32
-         "0xf5q17kkxsrm2gsi93h4pwlv663kji73r2g4asb97klsmb626a4"))))
-    (outputs '("out"))
-    (arguments
-     (substitute-keyword-arguments (package-arguments llvm-6)
-       ((#:phases phases)
-        #~(modify-phases #$phases
-            (add-before 'build 'shared-lib-workaround
-              ;; Even with CMAKE_SKIP_BUILD_RPATH=FALSE, llvm-tblgen
-              ;; doesn't seem to get the correct rpath to be able to run
-              ;; from the build directory.  Set LD_LIBRARY_PATH as a
-              ;; workaround.
-              (lambda _
-                (setenv "LD_LIBRARY_PATH"
-                        (string-append (getcwd) "/lib"))))
-            (delete 'install-opt-viewer)))))))
-
 (define-public llvm-16
   (make-llvm "16.0.6"))
 
diff --git a/gnu/packages/patches/llvm-3.5-fix-clang-build-with-gcc5.patch b/gnu/packages/patches/llvm-3.5-fix-clang-build-with-gcc5.patch
deleted file mode 100644
index faa8252c432..00000000000
--- a/gnu/packages/patches/llvm-3.5-fix-clang-build-with-gcc5.patch
+++ /dev/null
@@ -1,35 +0,0 @@
-This patch was downloaded from https://sft.its.cern.ch/jira/browse/ROOT-7047.
-It fixes the build of clang 3.5 with GCC 5.  File paths have been adjusted.
-
-From 00f3ed6eee41da871799ad0fd19153c7682d61fe Mon Sep 17 00:00:00 2001
-From: Alexander Klimov <alserkli@inbox.ru>
-Date: Mon, 26 Jan 2015 18:45:23 +0200
-Subject: [PATCH] [ADT/IntrusiveRefCntPtr] Give friend access to
- IntrusiveRefCntPtr<X> so the relevant move constructor can
- access 'Obj'.
-
-From LLVM upstream:
-Author: Argyrios Kyrtzidis <akyrtzi@gmail.com>
-Date:   Tue Sep 23 06:06:43 2014 +0000
-git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218295 91177308-0d34-0410-b5e6-96231b3b80d8
----
- interpreter/llvm/src/include/llvm/ADT/IntrusiveRefCntPtr.h |    3 +++
- 1 file changed, 3 insertions(+)
-
-diff --git a/include/llvm/ADT/IntrusiveRefCntPtr.h b/include/llvm/ADT/IntrusiveRefCntPtr.h
-index f9df378..c859c98 100644
---- a/include/llvm/ADT/IntrusiveRefCntPtr.h
-+++ b/include/llvm/ADT/IntrusiveRefCntPtr.h
-@@ -197,6 +197,9 @@ public:
-   private:
-     void retain() { if (Obj) IntrusiveRefCntPtrInfo<T>::retain(Obj); }
-     void release() { if (Obj) IntrusiveRefCntPtrInfo<T>::release(Obj); }
-+
-+    template <typename X>
-+    friend class IntrusiveRefCntPtr;
-   };
- 
-   template<class T, class U>
--- 
-1.7.10.4
-