diff --git a/overlay/default.nix b/overlay/default.nix
index 0b31505..2353f6a 100644
--- a/overlay/default.nix
+++ b/overlay/default.nix
@@ -86,8 +86,11 @@ in nullPkgs // {
 
   erisPatchHook = final.callPackage ./eris-patch-hook {
     patchelf = prev.patchelf.overrideAttrs (attrs: {
-      patches = attrs.patched or [ ]
-        ++ [ ./patchelf/dynstr.patch ./patchelf/shiftFile.patch ];
+      patches = attrs.patched or [ ] ++ [
+        ./patchelf/dynstr.patch
+        ./patchelf/shiftFile.patch
+        ./patchelf/disable-assert.patch
+      ];
     });
   };
 
diff --git a/overlay/eris-patch-hook/eris_patch.nim b/overlay/eris-patch-hook/eris_patch.nim
index 0dff3ab..10def8b 100644
--- a/overlay/eris-patch-hook/eris_patch.nim
+++ b/overlay/eris-patch-hook/eris_patch.nim
@@ -164,8 +164,11 @@ while pendingFiles.len != 0:
       for path, urn in fileClosure(replacementPath).pairs:
         closure[path] = %urn
     if pendingFile.replacements.len != 0:
+      replaceCmd.add(" 2>&1")
       let (msg, exitCode) = execCmdEx(replaceCmd, options = {poUsePath})
       if exitCode != 0:
+        echo "Patchelf failed"
+        echo replaceCmd
         echo msg
         quit exitCode
     outputManifests[pendingFile.outputRoot][filePath] = %* {
diff --git a/overlay/patchelf/disable-assert.patch b/overlay/patchelf/disable-assert.patch
new file mode 100644
index 0000000..90d92be
--- /dev/null
+++ b/overlay/patchelf/disable-assert.patch
@@ -0,0 +1,13 @@
+diff --git a/src/patchelf.cc b/src/patchelf.cc
+index 0c672e1..d9c2efb 100644
+--- a/src/patchelf.cc
++++ b/src/patchelf.cc
+@@ -894,7 +894,7 @@ void ElfFile<ElfFileParamNames>::rewriteSectionsExecutable()
+     debug("first reserved offset/addr is 0x%x/0x%llx\n",
+         startOffset, (unsigned long long) startAddr);
+ 
+-    assert(startAddr % getPageSize() == startOffset % getPageSize());
++    //assert(startAddr % getPageSize() == startOffset % getPageSize());
+     Elf_Addr firstPage = startAddr - startOffset;
+     debug("first page is 0x%llx\n", (unsigned long long) firstPage);
+