diff --git a/sdk_container/src/third_party/portage-stable/dev-lang/nasm/files/nasm-3.01-musl.patch b/sdk_container/src/third_party/portage-stable/dev-lang/nasm/files/nasm-3.01-musl.patch
new file mode 100644
index 0000000000..20efe150b0
--- /dev/null
+++ b/sdk_container/src/third_party/portage-stable/dev-lang/nasm/files/nasm-3.01-musl.patch
@@ -0,0 +1,92 @@
+https://github.com/netwide-assembler/nasm/commit/44e89ba9b650b5e1533bca43682e167f51a3511f
+From: "H. Peter Anvin (Intel)" <hpa@zytor.com>
+Date: Sun, 12 Oct 2025 12:48:32 -0700
+Subject: [PATCH] compiler.h: drop the stupid C++-style cast-to-bool hack
+
+The C++-style cast-to-bool hack was broken in concept that it doesn't help the
+fundamental problem -- implicit conversions are broken for the
+backwards compatibility enum definition -- as well as in
+implementation, as it misspelled __STDC_VERSION__ as __STDC_VERSION.
+
+The #ifdef bool test *should* have prevented this problem, but
+apparently several compilers do define "bool" in <stdbool.h> even when
+it is a keyword, in violation of the C23 spec.
+
+Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
+--- a/include/compiler.h
++++ b/include/compiler.h
+@@ -181,19 +181,10 @@ size_t strlcpy(char *, const char *, size_t);
+ char * pure_func strrchrnul(const char *, int);
+ #endif
+
+-#if !defined(__cplusplus) || (__STDC_VERSION >= 202311L)
+ /* C++ and C23 have bool, false, and true as proper keywords */
++#if !defined(__cplusplus) || (__STDC_VERSION__ >= 202311L)
+ # ifdef HAVE_STDBOOL_H
+-/* If <stdbool.h> exists, include it explicitly to prevent it from
+-   begin included later, causing the "bool" macro to be defined. */
+ #  include <stdbool.h>
+-#  ifdef bool
+-/* Force bool to be a typedef instead of a macro. What a "clever" hack
+-   this is... */
+-    typedef bool                /* The macro definition of bool */
+-#  undef bool
+-        bool;                   /* No longer the macro definition */
+-#  endif
+ # elif defined(HAVE___BOOL)
+    typedef _Bool bool;
+ #  define false 0
+@@ -201,14 +192,10 @@ char * pure_func strrchrnul(const char *, int);
+ # else
+ /* This is a bit dangerous, because casting to this ersatz bool
+    will not produce the same result as the standard (bool) cast.
+-   Instead, use the bool() constructor-style macro defined below. */
++   Instead, use the explicit construct !!x instead of relying on
++   implicit conversions or casts. */
+ typedef enum bool { false, true } bool;
+ # endif
+-/* This amounts to a C++-style conversion cast to bool.  This works
+-   because C ignores an argument-taking macro when used without an
+-   argument and because bool was redefined as a typedef if it previously
+-   was defined as a macro (see above.) */
+-# define bool(x) ((bool)!!(x))
+ #endif
+
+ /* Create a NULL pointer of the same type as the address of
+@@ -321,11 +308,11 @@ static inline void *mempset(void *dst, int c, size_t n)
+  * less likely to be taken.
+  */
+ #ifdef HAVE___BUILTIN_EXPECT
+-# define likely(x)	__builtin_expect(bool(x), true)
+-# define unlikely(x)	__builtin_expect(bool(x), false)
++# define likely(x)	__builtin_expect(!!(x), true)
++# define unlikely(x)	__builtin_expect(!!(x), false)
+ #else
+-# define likely(x)	bool(x)
+-# define unlikely(x)	bool(x)
++# define likely(x)	(!!(x))
++# define unlikely(x)	(!!(x))
+ #endif
+
+ #ifdef HAVE___BUILTIN_PREFETCH
+
+https://github.com/netwide-assembler/nasm/commit/746e7c9efa37cec9a44d84a1e96b8c38f385cc1f
+From: "H. Peter Anvin (Intel)" <hpa@zytor.com>
+Date: Sun, 12 Oct 2025 13:05:55 -0700
+Subject: [PATCH] compiler.h: the test for "neither C++ nor C23" still wrong
+
+The test needs to test for neither nor; as it was it tested "(not C++)
+or C23" which was not at all what was intended...
+
+Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
+--- a/include/compiler.h
++++ b/include/compiler.h
+@@ -182,7 +182,7 @@ char * pure_func strrchrnul(const char *, int);
+ #endif
+
+ /* C++ and C23 have bool, false, and true as proper keywords */
+-#if !defined(__cplusplus) || (__STDC_VERSION__ >= 202311L)
++#if !defined(__cplusplus) && (__STDC_VERSION__ < 202311L)
+ # ifdef HAVE_STDBOOL_H
+ #  include <stdbool.h>
+ # elif defined(HAVE___BOOL)
diff --git a/sdk_container/src/third_party/portage-stable/dev-lang/nasm/nasm-3.01.ebuild b/sdk_container/src/third_party/portage-stable/dev-lang/nasm/nasm-3.01.ebuild
index e15966772d..58eb4f46d2 100644
--- a/sdk_container/src/third_party/portage-stable/dev-lang/nasm/nasm-3.01.ebuild
+++ b/sdk_container/src/third_party/portage-stable/dev-lang/nasm/nasm-3.01.ebuild
@@ -41,6 +41,9 @@ QA_CONFIG_IMPL_DECL_SKIP=(
 	__bswap_16
 	__bswap_32
 	__bswap_64
+
+	# has fallback code to handle this missing on musl
+	stdc_leading_zeros
 )
 
 # [fonts note] doc/psfonts.ph defines ordered list of font preference.
@@ -60,6 +63,7 @@ BDEPEND="
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-2.15-bsd-cp-doc.patch
+	"${FILESDIR}"/${P}-musl.patch # merged upstream
 )
 
 src_prepare() {